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Finding the Fourth Proportional to 664,489.90, 996,734.85 and 440,103.70

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Solution

The fourth proportional to 664,489.90, 996,734.85 and 440,103.70 is: 660,155.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,489.90 : 996,734.85 = 440,103.70 : x
  2. Step 2: Convert to fraction form
    664,489.90/996,734.85 = 440,103.70/x
  3. Step 3: Cross multiply
    664,489.90x = 996,734.85 × 440,103.70
  4. Step 4: Simplify right side
    664,489.90x = 438,666,695,403.95
  5. Step 5: Solve for x
    x = 438,666,695,403.95/664,489.90
  6. Step 6: Final answer
    x = 660,155.55

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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.