Home / 725,414.40-1,088,121.60-389,491.20

Finding the Fourth Proportional to 725,414.40, 1,088,121.60 and 389,491.20

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Solution

The fourth proportional to 725,414.40, 1,088,121.60 and 389,491.20 is: 584,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,414.40 : 1,088,121.60 = 389,491.20 : x
  2. Step 2: Convert to fraction form
    725,414.40/1,088,121.60 = 389,491.20/x
  3. Step 3: Cross multiply
    725,414.40x = 1,088,121.60 × 389,491.20
  4. Step 4: Simplify right side
    725,414.40x = 423,813,787,729.92
  5. Step 5: Solve for x
    x = 423,813,787,729.92/725,414.40
  6. Step 6: Final answer
    x = 584,236.80

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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.