Question

First, second and the third terms of a proportion are $5,120$ and $40$ respectively. Then the fourth term is :

• A. $89$
• B. $480$
• C. $960$
• D. $98$

Answer 1

The correct option is C $960$

$5:120::40:x$

$\therefore$ $\frac{5}{120}=\frac{40}{x}$

$\therefore$ $x=\frac{120\times 40}{5}=960$.