Question
Find the fourth proportion of (k + 1), (2k + 2) and (3k + 3). (Note: 'k' is the smallest two-digit composite number.)
Solution
'k' = 10 k + 1 = 10 + 1 = 11 2k + 2 = 2 × 10 + 2 = 22 3k + 3 = 3 × 10 + 3 = 33 Let the fourth proportion be 'm'. 11 : 22 :: 33 : m So, 11 × m = 22 × 33 Or, 'm' = 66
More Ratio and proportion Questions
- A total amount is divided among A, B, C and D in the ratio 2:5:6:1. If C receives Rs. 9000 more than D, find the difference between the shares of A and B.
- There are 850 students in four houses of a school i.e. (red, white, yellow and blue) . Ratio of number of students in red house to that in blue house is 2:...
- If ‘A’, ‘B’ and ‘C’ are in proportion in the given order while ‘A’ = 20 and ‘B’ = 40, then find the value of ‘C’.
- Ratio of number of book to number of pen sold by a shopkeeper is 23:15, respectively while ratio of number of pen to number of pencil sold by the same shop...
- Divide ₹720 among A, B and C in the ratio 5 : 7 : 12.
- An amount of Rs. 900 is shared among A, B and C such that A receives Rs. 150 more than B. B gets Rs. 70 more than C. What is the share of C?
- Find the third proportional to 14 and 42?
- P, Q and R together started a business. Seven times the investment of P equals nine times the investment of Q and the capital of Q is twice that of R. Find...
- Rs 1500 was divided among Sara, Ravi and Mohan in the ratio of 5:10:15 respectively. Find the amount received by Sara and Ravi together.
- What is the mean proportion between 9 and 16?
