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Finding the Fourth Proportional to 664,442.20, 996,663.30 and 613,120.60

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Solution

The fourth proportional to 664,442.20, 996,663.30 and 613,120.60 is: 919,680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,442.20 : 996,663.30 = 613,120.60 : x
  2. Step 2: Convert to fraction form
    664,442.20/996,663.30 = 613,120.60/x
  3. Step 3: Cross multiply
    664,442.20x = 996,663.30 × 613,120.60
  4. Step 4: Simplify right side
    664,442.20x = 611,074,800,493.98
  5. Step 5: Solve for x
    x = 611,074,800,493.98/664,442.20
  6. Step 6: Final answer
    x = 919,680.90

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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.