What is the ratio of the mean proportional between 8.1 and 3.6 and the third proportional of 2 and 3?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 6:5
Let the mean proportional between 8.1 and 3.6 = b
⇒ b² = 8.1 × 3.6
⇒ b = 5.4
Let the third proportional of 2 and 3 = c
⇒ 2/3 = 3/c
⇒ c = 9/2 = 4.5
b/c = (5.4)/(4.5) = 6/5