Home / 521,129.40-781,694.10-221,534.70

Finding the Fourth Proportional to 521,129.40, 781,694.10 and 221,534.70

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Solution

The fourth proportional to 521,129.40, 781,694.10 and 221,534.70 is: 332,302.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,129.40 : 781,694.10 = 221,534.70 : x
  2. Step 2: Convert to fraction form
    521,129.40/781,694.10 = 221,534.70/x
  3. Step 3: Cross multiply
    521,129.40x = 781,694.10 × 221,534.70
  4. Step 4: Simplify right side
    521,129.40x = 173,172,367,935.27
  5. Step 5: Solve for x
    x = 173,172,367,935.27/521,129.40
  6. Step 6: Final answer
    x = 332,302.05

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Similar ratio
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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.