Question

15. Find the mean proportional between 10 and 40?​

Answer 1

Answer:

If x, y and z are in continued proportion then y is called the mean proportional (or geometric mean) of x and z. If y is the mean proportional of x and z, y^2 = xz, i.e., y = +√xz. If x, y and z are in continued proportion then z is called the third proportional. For example, the third proportional of 4, 8 is 16.

Answer 2

Answer:

32:x::x:338

32∗338=x2  

10,816=x2

10816−−−−−√=x

x=104