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Finding the Fourth Proportional to 664,429.20, 996,643.80 and 398,052.60

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Solution

The fourth proportional to 664,429.20, 996,643.80 and 398,052.60 is: 597,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,429.20 : 996,643.80 = 398,052.60 : x
  2. Step 2: Convert to fraction form
    664,429.20/996,643.80 = 398,052.60/x
  3. Step 3: Cross multiply
    664,429.20x = 996,643.80 × 398,052.60
  4. Step 4: Simplify right side
    664,429.20x = 396,716,655,863.88
  5. Step 5: Solve for x
    x = 396,716,655,863.88/664,429.20
  6. Step 6: Final answer
    x = 597,078.90

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Similar ratio
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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.