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Finding the Fourth Proportional to 664,755.20, 997,132.80 and 629,763.20

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Solution

The fourth proportional to 664,755.20, 997,132.80 and 629,763.20 is: 944,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,755.20 : 997,132.80 = 629,763.20 : x
  2. Step 2: Convert to fraction form
    664,755.20/997,132.80 = 629,763.20/x
  3. Step 3: Cross multiply
    664,755.20x = 997,132.80 × 629,763.20
  4. Step 4: Simplify right side
    664,755.20x = 627,957,542,952.96
  5. Step 5: Solve for x
    x = 627,957,542,952.96/664,755.20
  6. Step 6: Final answer
    x = 944,644.80

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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.