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Finding the Fourth Proportional to 665,752.20, 998,045.10 and 399,229.80

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Solution

The fourth proportional to 665,752.20, 998,045.10 and 399,229.80 is: 598,494.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,752.20 : 998,045.10 = 399,229.80 : x
  2. Step 2: Convert to fraction form
    665,752.20/998,045.10 = 399,229.80/x
  3. Step 3: Cross multiply
    665,752.20x = 998,045.10 × 399,229.80
  4. Step 4: Simplify right side
    665,752.20x = 398,449,345,663.98
  5. Step 5: Solve for x
    x = 398,449,345,663.98/665,752.20
  6. Step 6: Final answer
    x = 598,494.97

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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.