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Finding the Fourth Proportional to 664,459.20, 996,688.80 and 398,082.60

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Solution

The fourth proportional to 664,459.20, 996,688.80 and 398,082.60 is: 597,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,459.20 : 996,688.80 = 398,082.60 : x
  2. Step 2: Convert to fraction form
    664,459.20/996,688.80 = 398,082.60/x
  3. Step 3: Cross multiply
    664,459.20x = 996,688.80 × 398,082.60
  4. Step 4: Simplify right side
    664,459.20x = 396,764,468,894.88
  5. Step 5: Solve for x
    x = 396,764,468,894.88/664,459.20
  6. Step 6: Final answer
    x = 597,123.90

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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.