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Finding the Fourth Proportional to 664,428.70, 996,643.05 and 398,052.10

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Solution

The fourth proportional to 664,428.70, 996,643.05 and 398,052.10 is: 597,078.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,428.70 : 996,643.05 = 398,052.10 : x
  2. Step 2: Convert to fraction form
    664,428.70/996,643.05 = 398,052.10/x
  3. Step 3: Cross multiply
    664,428.70x = 996,643.05 × 398,052.10
  4. Step 4: Simplify right side
    664,428.70x = 396,715,859,002.91
  5. Step 5: Solve for x
    x = 396,715,859,002.91/664,428.70
  6. Step 6: Final answer
    x = 597,078.15

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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.