The fourth proportional to 5, 8 and 30 is :
Answer & explanation
Correct answer: option 3
5 : 8 :: 30 : x
⇒The third proportional x,
⇒ 5x = 8 x 30
⇒ 5x = 240
⇒ x = 48.
The fourth proportional to 5, 8 and 30 is :
Correct answer: option 3
5 : 8 :: 30 : x
⇒The third proportional x,
⇒ 5x = 8 x 30
⇒ 5x = 240
⇒ x = 48.