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Finding the Fourth Proportional to 438,404.30, 656,440.05 and 279,773.90

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Solution

The fourth proportional to 438,404.30, 656,440.05 and 279,773.90 is: 418,916.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,404.30 : 656,440.05 = 279,773.90 : x
  2. Step 2: Convert to fraction form
    438,404.30/656,440.05 = 279,773.90/x
  3. Step 3: Cross multiply
    438,404.30x = 656,440.05 × 279,773.90
  4. Step 4: Simplify right side
    438,404.30x = 183,654,792,904.70
  5. Step 5: Solve for x
    x = 183,654,792,904.70/438,404.30
  6. Step 6: Final answer
    x = 418,916.50

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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.