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Finding the Fourth Proportional to 664,613.20, 996,919.80 and 398,236.60

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Solution

The fourth proportional to 664,613.20, 996,919.80 and 398,236.60 is: 597,354.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,613.20 : 996,919.80 = 398,236.60 : x
  2. Step 2: Convert to fraction form
    664,613.20/996,919.80 = 398,236.60/x
  3. Step 3: Cross multiply
    664,613.20x = 996,919.80 × 398,236.60
  4. Step 4: Simplify right side
    664,613.20x = 397,009,951,624.68
  5. Step 5: Solve for x
    x = 397,009,951,624.68/664,613.20
  6. Step 6: Final answer
    x = 597,354.90

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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.