Question

If the first, second and the fourth terms of a perpendicular are $5,3$ and $15$ respectively is third terms.

Answer 1

$5:3::X:15$

Product of mean $=$ product of extreme

$3\times x=5\times 15$

$x=\frac{5\times 15}{3}$

$x=25$

$\therefore$ Thired term $=25$