Question

Find the third proportional to (iv) 2.5 and 8.5

Answer 1

Step-by-step explanation:

Let the third proportional be x.

2.5 , 8.5 and x are in continued proportion.

$\frac{2.5}{8.5} = \frac{8.5}{x}$

$2.5x = 8.5 \times 8.5$

$2.5x = 72.25$

$x = \frac{72.25}{2.5}$

$x = 28.9$

The required third proportion is 28.9