What is the fourth proportional of 3sqrt5, space 5sqrt8 space andspace 3sqrt10 ?

SSC CHSL 2023 PYQ — Question 74

SSC CHSL - 09 Aug 2023 - Shift 4 • Quantitative Aptitude • Q74

What is the fourth proportional of $3\sqrt5, \space 5\sqrt8 \space \text{and}\space 3\sqrt10$ ?

Show answer & explanation

Correct answer: D

Explanation

The correct answer is Option 4 i.e. 20.

Fourth proportion = (5√8 × 3√10)/(3√5) = 60/3 = 20