QQuestion
Find the third proportional of 5, 10.
✓Answer
Let the third Proportion be x
5, 10, x ⇒ 5, 10, 10, x
Product of mean = 10 × 10 = 100
Product of extreme = 5 × x = 5x
Now, Product of extreme = Product of mean
⇒ 5x = 100
⇒ x = 20
∴ The third Proportion is 20.
Related Questions
More WBBSE Easy level questions
If A : B = 2 : 3, B : C = 5 : 8, C : D = 6 : 7, then A : D = (a) 2 : 7 (b) 7 : 2 (c) 5 : 8 (d) 5 : 14
If = 1, then find the value of .
If a : b = b : c, prove that = 1
The corresponding sides of two similar triangles are ____.
State True or False: The compound ratio of 2ab : c², bc : a² and ca : 2b2 is 1 : 1.
Find the mean proportion of xy² and xz²
Find the ratio of the cost price and selling price of an article which is sold at 25% profit
If (3x − 2y) : (3x + 2y) = 4 : 5 then what is (x + y) : (x − y)?
Find the ratio of length of radius and perimeter of a circle
If a:2 = b:5 then how many % of b is a (a) 20 (b) 30 (c) 40 (d) 50
If = , then find the value of
If (b + c - a)x = (c + a - b)y = (a + b - c)z = 2, then prove that (1/x + 1/y)(1/y + 1/z)(1/z + 1/x) = abc.