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Finding the Fourth Proportional to 665,473.60, 996,898.20 and 398,440.90

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Solution

The fourth proportional to 665,473.60, 996,898.20 and 398,440.90 is: 596,875.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,473.60 : 996,898.20 = 398,440.90 : x
  2. Step 2: Convert to fraction form
    665,473.60/996,898.20 = 398,440.90/x
  3. Step 3: Cross multiply
    665,473.60x = 996,898.20 × 398,440.90
  4. Step 4: Simplify right side
    665,473.60x = 397,205,016,016.38
  5. Step 5: Solve for x
    x = 397,205,016,016.38/665,473.60
  6. Step 6: Final answer
    x = 596,875.69

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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.