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Finding the Fourth Proportional to 658,220.46, 987,687.90 and 279,354.30

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Solution

The fourth proportional to 658,220.46, 987,687.90 and 279,354.30 is: 419,183.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,220.46 : 987,687.90 = 279,354.30 : x
  2. Step 2: Convert to fraction form
    658,220.46/987,687.90 = 279,354.30/x
  3. Step 3: Cross multiply
    658,220.46x = 987,687.90 × 279,354.30
  4. Step 4: Simplify right side
    658,220.46x = 275,914,861,922.97
  5. Step 5: Solve for x
    x = 275,914,861,922.97/658,220.46
  6. Step 6: Final answer
    x = 419,183.05

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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.