arrow
arrow
arrow
What is the third proportional to 54x254x^254x2​ and 18xy?
Question

What is the third proportional to 54x254x^2​ and 18xy?

A.

4y24y^2​​

B.

6y26y^2

C.

5y25y^2

D.

7y27y^2

Correct option is B

Given
First term = 54x254x^2​​
Second term = 18xy
Formula Used
If c is the third proportional to a and b, then c = b2a \frac{b^2}{a}​​
Solution
Substitute the given values into the formula:
Third proportional = (18xy)254x2\frac{(18xy)^2}{54x^2}​​

Third proportional = 324x2y254x2 \frac{324x^2y^2}{54x^2}​​

Third proportional = 6y26y^2​​
Final Answer
So the correct answer is (b)

Free Tests

Free
Must Attempt

RRB NTPC UG Level PYP (Held on 7 Aug 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB Group D Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
TEST PRIME

Access ‘RRB Group D’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
1 month
students-icon
482k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow