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Finding the Fourth Proportional to 442,832.20, 664,248.30 and 418,337.80

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Solution

The fourth proportional to 442,832.20, 664,248.30 and 418,337.80 is: 627,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,832.20 : 664,248.30 = 418,337.80 : x
  2. Step 2: Convert to fraction form
    442,832.20/664,248.30 = 418,337.80/x
  3. Step 3: Cross multiply
    442,832.20x = 664,248.30 × 418,337.80
  4. Step 4: Simplify right side
    442,832.20x = 277,880,172,475.74
  5. Step 5: Solve for x
    x = 277,880,172,475.74/442,832.20
  6. Step 6: Final answer
    x = 627,506.70

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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.