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Finding the Fourth Proportional to 418,781.87, 628,535.48 and 219,241.83

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Solution

The fourth proportional to 418,781.87, 628,535.48 and 219,241.83 is: 329,052.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,781.87 : 628,535.48 = 219,241.83 : x
  2. Step 2: Convert to fraction form
    418,781.87/628,535.48 = 219,241.83/x
  3. Step 3: Cross multiply
    418,781.87x = 628,535.48 × 219,241.83
  4. Step 4: Simplify right side
    418,781.87x = 137,801,267,758.92
  5. Step 5: Solve for x
    x = 137,801,267,758.92/418,781.87
  6. Step 6: Final answer
    x = 329,052.61

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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.