In proportion, the product of the 1st and 4th term is 70 and that of the 2nd and 3rd term is 3.5x. Find the value of x.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 20.
Calculations:
Product of the first and fourth terms = 70
Product of the second and third terms = 3.5x
⇒ (1st term) × (4th term) = (2nd term) × (3rd term)
⇒ 70 = 3.5x
⇒ x = 70/3.5 = 700/35 = 20