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Finding the Fourth Proportional to 521,066.20, 781,672.20 and 221,544.40

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Solution

The fourth proportional to 521,066.20, 781,672.20 and 221,544.40 is: 332,347.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,066.20 : 781,672.20 = 221,544.40 : x
  2. Step 2: Convert to fraction form
    521,066.20/781,672.20 = 221,544.40/x
  3. Step 3: Cross multiply
    521,066.20x = 781,672.20 × 221,544.40
  4. Step 4: Simplify right side
    521,066.20x = 173,175,098,545.68
  5. Step 5: Solve for x
    x = 173,175,098,545.68/521,066.20
  6. Step 6: Final answer
    x = 332,347.60

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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.