Question

Find the fourth proportional to
$\frac{1}{15},\frac{1}{5},\frac{1}{12}$

Answer 1

Ratio of 1/16 , 1/5 :- Ratio of 1/12 r x

$\frac{1/15}{1/5}=\frac{5}{15}=\frac{1}{3}$ $\frac{1/12}{x}=\frac{1}{3}$

$\Rightarrow x=\frac{3}{12}=\frac{1}{4}$