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Finding the Fourth Proportional to 658,368.80, 987,553.20 and 392,429.60

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Solution

The fourth proportional to 658,368.80, 987,553.20 and 392,429.60 is: 588,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,368.80 : 987,553.20 = 392,429.60 : x
  2. Step 2: Convert to fraction form
    658,368.80/987,553.20 = 392,429.60/x
  3. Step 3: Cross multiply
    658,368.80x = 987,553.20 × 392,429.60
  4. Step 4: Simplify right side
    658,368.80x = 387,545,107,254.72
  5. Step 5: Solve for x
    x = 387,545,107,254.72/658,368.80
  6. Step 6: Final answer
    x = 588,644.40

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Similar ratio
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1.5x scale

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.