Question

Find x if 9. x, x, 49 are in proportion​

Answer 1

Answer:9/x=x/49

           or, x*x=49*9

           or, x^2=442

           or, x^2=21^2

            therefore, x=21

Explanation:

9 x x and 49 are in continued proportion so we cross multiply them. the root of 442 is 21 so we cut of the roots of both sides and the remaining answer is 21.