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Finding the Fourth Proportional to 408,318.53, 608,521.91 and 387,060.89

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Solution

The fourth proportional to 408,318.53, 608,521.91 and 387,060.89 is: 576,841.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,318.53 : 608,521.91 = 387,060.89 : x
  2. Step 2: Convert to fraction form
    408,318.53/608,521.91 = 387,060.89/x
  3. Step 3: Cross multiply
    408,318.53x = 608,521.91 × 387,060.89
  4. Step 4: Simplify right side
    408,318.53x = 235,535,027,091.19
  5. Step 5: Solve for x
    x = 235,535,027,091.19/408,318.53
  6. Step 6: Final answer
    x = 576,841.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.