Question

Find the ratio of third proportional of 12, 30 and
mean proportional of 9,25:​

Answer 1

Answer: 5

Explanation:

1st case,

12:30::30:x (where, x is the 3rd proportional) [let]

or, 12/30=30/x

or, x=75

2nd case,

9:y::y:25 (where, y is the mean proportional) [let]

or, 9/y=y/25

or, y=15 (Rejecting negative value of -15)

Required ratio=x:y=75:15=75/15=5