Home / 981.20-1,470-901.04

Finding the Fourth Proportional to 981.20, 1,470 and 901.04

Calculator

Solution

The fourth proportional to 981.20, 1,470 and 901.04 is: 1,349.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.20 : 1,470 = 901.04 : x
  2. Step 2: Convert to fraction form
    981.20/1,470 = 901.04/x
  3. Step 3: Cross multiply
    981.20x = 1,470 × 901.04
  4. Step 4: Simplify right side
    981.20x = 1,324,528.80
  5. Step 5: Solve for x
    x = 1,324,528.80/981.20
  6. Step 6: Final answer
    x = 1,349.91

Related Problems

Find fourth proportional to 490.60, 735 and 450.52
Half scale
Find fourth proportional to 1,962.40, 2,940 and 1,802.08
Double scale
Find fourth proportional to 982.20, 1,471.50 and 902.04
Similar ratio
Find fourth proportional to 1,471.80, 2,205 and 1,351.56
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.