Question Detail Find the fourth proportion to 2,3,6 181294 Answer: Option CExplanation:2:3 :: 6:x => 2/3 = 6/x => x = 18/2 => x = 9 Similar Questions : 1. Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is 2:53:54:56:5 Answer: Option CExplanation:Let the third number be x. First Number (120/100)*x = 6x/5 Second Number (150/100)*x = 3x/2 Ratio = 6x/5:3x/2 => 4:5 2. In a college, the ratio of the number of boys to girls is 8 : 5. If there are 200 girls, the total number of students in the college is 420520620720 Answer: Option BExplanation:Let the boy are 8x and Girls are 5x => 5x = 200 => x = 40 Total students = 8x+5x = 13x = 13(40) = 520 3. In a mixture 60 litres, the ratio of milk and water 2 : 1. If the this ratio is to be 1 : 2, then the quanity of water to be further added is 20 liters30 liters50 liters60 liters Answer: Option DExplanation:Quantity of Milk = 60*(2/3) = 40 liters Quantity of water = 60-40 = 20 liters As per question we need to add water to get quantity 2:1 => 40/(20+x) = 1/2 => 20 + x = 80 => x = 60 liters 4. Rs. 120 are divided among A, B, C such that A's share is Rs. 20 more than B's and Rs. 20 less than C's. What is B's share Rs 10Rs 20Rs 24Rs 28 Answer: Option BExplanation:Let C = x. Then A = (x—20) and B = (x—40). x + x - 20 + x - 40 = 120 Or x=60. A:B:C = 40:20:60 = 2:1 :3. B's share = Rs. 120*(1/6) = Rs. 20 5. If Rs. 782 is divided into three parts, proportional to \begin{aligned} \frac{1}{2}:\frac{2}{3}:\frac{3}{4} \end{aligned} find the first part. 190204220230 Answer: Option BExplanation:\begin{aligned} \frac{1}{2}:\frac{2}{3}:\frac{3}{4} \\ = 6:8:9\\ \text{First part =} 782 * \frac{6}{23} \\ = 204 \end{aligned} Read more from - Ratio and Proportion Questions Answers