If 276 is the mean proportion between x and 368, what is the value of x?

Correct option is A

Given:

276 is the mean proportional between x and 368.

Formula Used:
If m is the mean proportional between a and b, then m$$^2 =$$​ ab.

Solution:

​$$276^2 = x \times 368 \\ \ \\ x = \frac{276^2}{368}\\ \ \\ = \frac{76176}{368} = 207$$​​