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Finding the Fourth Proportional to 664,474.80, 996,712.20 and 658,569.90

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Solution

The fourth proportional to 664,474.80, 996,712.20 and 658,569.90 is: 987,854.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,474.80 : 996,712.20 = 658,569.90 : x
  2. Step 2: Convert to fraction form
    664,474.80/996,712.20 = 658,569.90/x
  3. Step 3: Cross multiply
    664,474.80x = 996,712.20 × 658,569.90
  4. Step 4: Simplify right side
    664,474.80x = 656,404,653,882.78
  5. Step 5: Solve for x
    x = 656,404,653,882.78/664,474.80
  6. Step 6: Final answer
    x = 987,854.85

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Half scale
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Double scale
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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.