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How can I get precisely a certain cubic cm by changing the following factors?


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2












$begingroup$


By a calculation of the size of the cubic cm which its sizes are: 3.8330 * 3.8330 * 5.17455, I got a volume of 76.02. How can I get precisely '''76.04''' cubic cm, by changing the first two mentioned factors (i.e. 3.8330 * 3.8330 * 5.17455) equally?



N.b. I tried many ways and I couldn't find it, always I got more or less but not precisely.










share|cite|improve this question









New contributor




Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$

















    2












    $begingroup$


    By a calculation of the size of the cubic cm which its sizes are: 3.8330 * 3.8330 * 5.17455, I got a volume of 76.02. How can I get precisely '''76.04''' cubic cm, by changing the first two mentioned factors (i.e. 3.8330 * 3.8330 * 5.17455) equally?



    N.b. I tried many ways and I couldn't find it, always I got more or less but not precisely.










    share|cite|improve this question









    New contributor




    Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      2












      2








      2





      $begingroup$


      By a calculation of the size of the cubic cm which its sizes are: 3.8330 * 3.8330 * 5.17455, I got a volume of 76.02. How can I get precisely '''76.04''' cubic cm, by changing the first two mentioned factors (i.e. 3.8330 * 3.8330 * 5.17455) equally?



      N.b. I tried many ways and I couldn't find it, always I got more or less but not precisely.










      share|cite|improve this question









      New contributor




      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      By a calculation of the size of the cubic cm which its sizes are: 3.8330 * 3.8330 * 5.17455, I got a volume of 76.02. How can I get precisely '''76.04''' cubic cm, by changing the first two mentioned factors (i.e. 3.8330 * 3.8330 * 5.17455) equally?



      N.b. I tried many ways and I couldn't find it, always I got more or less but not precisely.







      geometry






      share|cite|improve this question









      New contributor




      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|cite|improve this question









      New contributor




      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|cite|improve this question




      share|cite|improve this question








      edited 48 mins ago







      Ubiquitous Student













      New contributor




      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 2 hours ago









      Ubiquitous StudentUbiquitous Student

      1114




      1114




      New contributor




      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Ubiquitous Student is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















          3 Answers
          3






          active

          oldest

          votes


















          2












          $begingroup$

          You have $3.833 times 3.833 times5.174=76.02 .$



          You can change it by multiplying both sides by $displaystyle frac{76.04}{76.02}$.



          We then have $3.833 times 3.833 times5.174 times displaystyle frac{76.04}{76.02}=76.02 times displaystyle frac{76.04}{76.02}$.



          This comes out to $3.833 times 3.833 times5.17564=76.04 $






          share|cite|improve this answer









          $endgroup$









          • 1




            $begingroup$
            +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
            $endgroup$
            – Ethan Bolker
            1 hour ago










          • $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago












          • $begingroup$
            @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
            $endgroup$
            – Saketh Malyala
            1 hour ago










          • $begingroup$
            you can multiply 3.833 by 76.04/76.02 instead
            $endgroup$
            – Saketh Malyala
            1 hour ago










          • $begingroup$
            You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
            $endgroup$
            – Ethan Bolker
            1 hour ago





















          1












          $begingroup$

          Actually $3.833 cdot 3.833 cdot 5.174 = 76.0158$ so the added volume will be $.0242$



          One way is to think of it as adding a sheet $3.833 cdot 3.833$ with a volume of $0.0242 text{cm}^3$. How thick does it have to be to equal that volume?



          Hence, $frac{0.0242}{3.833^2} = .00165$



          So the dimensions will be $3.833 cdot 3.833 cdot (5.174 + .00165)$



          $3.833 cdot 3.833 cdot 5.17565 = 76.040$






          share|cite|improve this answer









          $endgroup$













          • $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago





















          0












          $begingroup$

          To avoid getting caught-up in specific numbers ...





          Suppose you have
          $$acdot b cdot c = d$$
          but you want $d$ to become $e$. You can make this happen by multiplying both sides by $e/d$:
          $$left(acdot b cdot c right)cdot frac{e}{d} = dcdotfrac{e}{d} = e$$



          Now, you can use the left-hand side's factor of $e/d$ to make adjustments to $a$, $b$, and/or $c$. If you just wanted to adjust one factor, you could write, say,




          $$left( acdot frac{e}{d}right)cdot bcdot c ;=; e tag{1}$$




          If you wanted to adjust two factors proportionally (as is specifically requested in the question), you can "split" $e/d$ equally across the factors using a square root:




          $$frac{e}{d} = sqrt{frac{e}{d}}cdotsqrt{frac{e}{d}} qquadtoqquadleft(acdot sqrt{frac{e}{d}}right)cdotleft(bcdot sqrt{frac{e}{d}}right)cdot c ;=; e tag{2}$$




          Finally, if you later decide you actually want to adjust your entire box proportionally, you can use cube roots:




          $$left(acdotsqrt[3]frac{e}{d}right)cdotleft(bcdotsqrt[3]frac{e}{d}right)cdot left(ccdotsqrt[3]frac{e}{d}right) ;=; e tag{3}$$




          Naturally, the same type of thing works with any number of overall factors and desired adjustments, using higher-level roots as needed.






          share|cite|improve this answer









          $endgroup$














            Your Answer








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            3 Answers
            3






            active

            oldest

            votes








            3 Answers
            3






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2












            $begingroup$

            You have $3.833 times 3.833 times5.174=76.02 .$



            You can change it by multiplying both sides by $displaystyle frac{76.04}{76.02}$.



            We then have $3.833 times 3.833 times5.174 times displaystyle frac{76.04}{76.02}=76.02 times displaystyle frac{76.04}{76.02}$.



            This comes out to $3.833 times 3.833 times5.17564=76.04 $






            share|cite|improve this answer









            $endgroup$









            • 1




              $begingroup$
              +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
              $endgroup$
              – Ethan Bolker
              1 hour ago










            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago












            • $begingroup$
              @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              you can multiply 3.833 by 76.04/76.02 instead
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
              $endgroup$
              – Ethan Bolker
              1 hour ago


















            2












            $begingroup$

            You have $3.833 times 3.833 times5.174=76.02 .$



            You can change it by multiplying both sides by $displaystyle frac{76.04}{76.02}$.



            We then have $3.833 times 3.833 times5.174 times displaystyle frac{76.04}{76.02}=76.02 times displaystyle frac{76.04}{76.02}$.



            This comes out to $3.833 times 3.833 times5.17564=76.04 $






            share|cite|improve this answer









            $endgroup$









            • 1




              $begingroup$
              +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
              $endgroup$
              – Ethan Bolker
              1 hour ago










            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago












            • $begingroup$
              @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              you can multiply 3.833 by 76.04/76.02 instead
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
              $endgroup$
              – Ethan Bolker
              1 hour ago
















            2












            2








            2





            $begingroup$

            You have $3.833 times 3.833 times5.174=76.02 .$



            You can change it by multiplying both sides by $displaystyle frac{76.04}{76.02}$.



            We then have $3.833 times 3.833 times5.174 times displaystyle frac{76.04}{76.02}=76.02 times displaystyle frac{76.04}{76.02}$.



            This comes out to $3.833 times 3.833 times5.17564=76.04 $






            share|cite|improve this answer









            $endgroup$



            You have $3.833 times 3.833 times5.174=76.02 .$



            You can change it by multiplying both sides by $displaystyle frac{76.04}{76.02}$.



            We then have $3.833 times 3.833 times5.174 times displaystyle frac{76.04}{76.02}=76.02 times displaystyle frac{76.04}{76.02}$.



            This comes out to $3.833 times 3.833 times5.17564=76.04 $







            share|cite|improve this answer












            share|cite|improve this answer



            share|cite|improve this answer










            answered 2 hours ago









            Saketh MalyalaSaketh Malyala

            7,7041535




            7,7041535








            • 1




              $begingroup$
              +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
              $endgroup$
              – Ethan Bolker
              1 hour ago










            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago












            • $begingroup$
              @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              you can multiply 3.833 by 76.04/76.02 instead
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
              $endgroup$
              – Ethan Bolker
              1 hour ago
















            • 1




              $begingroup$
              +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
              $endgroup$
              – Ethan Bolker
              1 hour ago










            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago












            • $begingroup$
              @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              you can multiply 3.833 by 76.04/76.02 instead
              $endgroup$
              – Saketh Malyala
              1 hour ago










            • $begingroup$
              You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
              $endgroup$
              – Ethan Bolker
              1 hour ago










            1




            1




            $begingroup$
            +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
            $endgroup$
            – Ethan Bolker
            1 hour ago




            $begingroup$
            +1 Note that you can multiply any one of the three factors by $76.04/75.02$, although there's an aesthetic argument for keeping the first two equal.
            $endgroup$
            – Ethan Bolker
            1 hour ago












            $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago






            $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago














            $begingroup$
            @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
            $endgroup$
            – Saketh Malyala
            1 hour ago




            $begingroup$
            @UbiquitousStudent do you want to change both of the first two parameters? or just one of them?
            $endgroup$
            – Saketh Malyala
            1 hour ago












            $begingroup$
            you can multiply 3.833 by 76.04/76.02 instead
            $endgroup$
            – Saketh Malyala
            1 hour ago




            $begingroup$
            you can multiply 3.833 by 76.04/76.02 instead
            $endgroup$
            – Saketh Malyala
            1 hour ago












            $begingroup$
            You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
            $endgroup$
            – Ethan Bolker
            1 hour ago






            $begingroup$
            You can take any two positive numbers $a$ and $b$, let $c = (76.04/76.02)/ab$ and then multiply each of the factors by $a$, $b$ and $c$. So you can make any two factors anything you like and adjust the third accordingly. If you want to keep the third factor the same and keep the first two equal, let $a = b =$ the square root of $76.04/76.02$.
            $endgroup$
            – Ethan Bolker
            1 hour ago













            1












            $begingroup$

            Actually $3.833 cdot 3.833 cdot 5.174 = 76.0158$ so the added volume will be $.0242$



            One way is to think of it as adding a sheet $3.833 cdot 3.833$ with a volume of $0.0242 text{cm}^3$. How thick does it have to be to equal that volume?



            Hence, $frac{0.0242}{3.833^2} = .00165$



            So the dimensions will be $3.833 cdot 3.833 cdot (5.174 + .00165)$



            $3.833 cdot 3.833 cdot 5.17565 = 76.040$






            share|cite|improve this answer









            $endgroup$













            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago


















            1












            $begingroup$

            Actually $3.833 cdot 3.833 cdot 5.174 = 76.0158$ so the added volume will be $.0242$



            One way is to think of it as adding a sheet $3.833 cdot 3.833$ with a volume of $0.0242 text{cm}^3$. How thick does it have to be to equal that volume?



            Hence, $frac{0.0242}{3.833^2} = .00165$



            So the dimensions will be $3.833 cdot 3.833 cdot (5.174 + .00165)$



            $3.833 cdot 3.833 cdot 5.17565 = 76.040$






            share|cite|improve this answer









            $endgroup$













            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago
















            1












            1








            1





            $begingroup$

            Actually $3.833 cdot 3.833 cdot 5.174 = 76.0158$ so the added volume will be $.0242$



            One way is to think of it as adding a sheet $3.833 cdot 3.833$ with a volume of $0.0242 text{cm}^3$. How thick does it have to be to equal that volume?



            Hence, $frac{0.0242}{3.833^2} = .00165$



            So the dimensions will be $3.833 cdot 3.833 cdot (5.174 + .00165)$



            $3.833 cdot 3.833 cdot 5.17565 = 76.040$






            share|cite|improve this answer









            $endgroup$



            Actually $3.833 cdot 3.833 cdot 5.174 = 76.0158$ so the added volume will be $.0242$



            One way is to think of it as adding a sheet $3.833 cdot 3.833$ with a volume of $0.0242 text{cm}^3$. How thick does it have to be to equal that volume?



            Hence, $frac{0.0242}{3.833^2} = .00165$



            So the dimensions will be $3.833 cdot 3.833 cdot (5.174 + .00165)$



            $3.833 cdot 3.833 cdot 5.17565 = 76.040$







            share|cite|improve this answer












            share|cite|improve this answer



            share|cite|improve this answer










            answered 1 hour ago









            Phil HPhil H

            4,3752412




            4,3752412












            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago




















            • $begingroup$
              Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
              $endgroup$
              – Ubiquitous Student
              1 hour ago


















            $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago






            $begingroup$
            Thank you very much for you answer (1+^). Is there a way to add change the first two parameters (3.833*3.833)? I mean even-though it'll be the same size, but if I want to change these dimensions is important.
            $endgroup$
            – Ubiquitous Student
            1 hour ago













            0












            $begingroup$

            To avoid getting caught-up in specific numbers ...





            Suppose you have
            $$acdot b cdot c = d$$
            but you want $d$ to become $e$. You can make this happen by multiplying both sides by $e/d$:
            $$left(acdot b cdot c right)cdot frac{e}{d} = dcdotfrac{e}{d} = e$$



            Now, you can use the left-hand side's factor of $e/d$ to make adjustments to $a$, $b$, and/or $c$. If you just wanted to adjust one factor, you could write, say,




            $$left( acdot frac{e}{d}right)cdot bcdot c ;=; e tag{1}$$




            If you wanted to adjust two factors proportionally (as is specifically requested in the question), you can "split" $e/d$ equally across the factors using a square root:




            $$frac{e}{d} = sqrt{frac{e}{d}}cdotsqrt{frac{e}{d}} qquadtoqquadleft(acdot sqrt{frac{e}{d}}right)cdotleft(bcdot sqrt{frac{e}{d}}right)cdot c ;=; e tag{2}$$




            Finally, if you later decide you actually want to adjust your entire box proportionally, you can use cube roots:




            $$left(acdotsqrt[3]frac{e}{d}right)cdotleft(bcdotsqrt[3]frac{e}{d}right)cdot left(ccdotsqrt[3]frac{e}{d}right) ;=; e tag{3}$$




            Naturally, the same type of thing works with any number of overall factors and desired adjustments, using higher-level roots as needed.






            share|cite|improve this answer









            $endgroup$


















              0












              $begingroup$

              To avoid getting caught-up in specific numbers ...





              Suppose you have
              $$acdot b cdot c = d$$
              but you want $d$ to become $e$. You can make this happen by multiplying both sides by $e/d$:
              $$left(acdot b cdot c right)cdot frac{e}{d} = dcdotfrac{e}{d} = e$$



              Now, you can use the left-hand side's factor of $e/d$ to make adjustments to $a$, $b$, and/or $c$. If you just wanted to adjust one factor, you could write, say,




              $$left( acdot frac{e}{d}right)cdot bcdot c ;=; e tag{1}$$




              If you wanted to adjust two factors proportionally (as is specifically requested in the question), you can "split" $e/d$ equally across the factors using a square root:




              $$frac{e}{d} = sqrt{frac{e}{d}}cdotsqrt{frac{e}{d}} qquadtoqquadleft(acdot sqrt{frac{e}{d}}right)cdotleft(bcdot sqrt{frac{e}{d}}right)cdot c ;=; e tag{2}$$




              Finally, if you later decide you actually want to adjust your entire box proportionally, you can use cube roots:




              $$left(acdotsqrt[3]frac{e}{d}right)cdotleft(bcdotsqrt[3]frac{e}{d}right)cdot left(ccdotsqrt[3]frac{e}{d}right) ;=; e tag{3}$$




              Naturally, the same type of thing works with any number of overall factors and desired adjustments, using higher-level roots as needed.






              share|cite|improve this answer









              $endgroup$
















                0












                0








                0





                $begingroup$

                To avoid getting caught-up in specific numbers ...





                Suppose you have
                $$acdot b cdot c = d$$
                but you want $d$ to become $e$. You can make this happen by multiplying both sides by $e/d$:
                $$left(acdot b cdot c right)cdot frac{e}{d} = dcdotfrac{e}{d} = e$$



                Now, you can use the left-hand side's factor of $e/d$ to make adjustments to $a$, $b$, and/or $c$. If you just wanted to adjust one factor, you could write, say,




                $$left( acdot frac{e}{d}right)cdot bcdot c ;=; e tag{1}$$




                If you wanted to adjust two factors proportionally (as is specifically requested in the question), you can "split" $e/d$ equally across the factors using a square root:




                $$frac{e}{d} = sqrt{frac{e}{d}}cdotsqrt{frac{e}{d}} qquadtoqquadleft(acdot sqrt{frac{e}{d}}right)cdotleft(bcdot sqrt{frac{e}{d}}right)cdot c ;=; e tag{2}$$




                Finally, if you later decide you actually want to adjust your entire box proportionally, you can use cube roots:




                $$left(acdotsqrt[3]frac{e}{d}right)cdotleft(bcdotsqrt[3]frac{e}{d}right)cdot left(ccdotsqrt[3]frac{e}{d}right) ;=; e tag{3}$$




                Naturally, the same type of thing works with any number of overall factors and desired adjustments, using higher-level roots as needed.






                share|cite|improve this answer









                $endgroup$



                To avoid getting caught-up in specific numbers ...





                Suppose you have
                $$acdot b cdot c = d$$
                but you want $d$ to become $e$. You can make this happen by multiplying both sides by $e/d$:
                $$left(acdot b cdot c right)cdot frac{e}{d} = dcdotfrac{e}{d} = e$$



                Now, you can use the left-hand side's factor of $e/d$ to make adjustments to $a$, $b$, and/or $c$. If you just wanted to adjust one factor, you could write, say,




                $$left( acdot frac{e}{d}right)cdot bcdot c ;=; e tag{1}$$




                If you wanted to adjust two factors proportionally (as is specifically requested in the question), you can "split" $e/d$ equally across the factors using a square root:




                $$frac{e}{d} = sqrt{frac{e}{d}}cdotsqrt{frac{e}{d}} qquadtoqquadleft(acdot sqrt{frac{e}{d}}right)cdotleft(bcdot sqrt{frac{e}{d}}right)cdot c ;=; e tag{2}$$




                Finally, if you later decide you actually want to adjust your entire box proportionally, you can use cube roots:




                $$left(acdotsqrt[3]frac{e}{d}right)cdotleft(bcdotsqrt[3]frac{e}{d}right)cdot left(ccdotsqrt[3]frac{e}{d}right) ;=; e tag{3}$$




                Naturally, the same type of thing works with any number of overall factors and desired adjustments, using higher-level roots as needed.







                share|cite|improve this answer












                share|cite|improve this answer



                share|cite|improve this answer










                answered 28 mins ago









                BlueBlue

                49.8k970158




                49.8k970158






















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