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Finding the Fourth Proportional to 399,782.92, 551,713.12 and 218,490.87

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Solution

The fourth proportional to 399,782.92, 551,713.12 and 218,490.87 is: 301,524.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,782.92 : 551,713.12 = 218,490.87 : x
  2. Step 2: Convert to fraction form
    399,782.92/551,713.12 = 218,490.87/x
  3. Step 3: Cross multiply
    399,782.92x = 551,713.12 × 218,490.87
  4. Step 4: Simplify right side
    399,782.92x = 120,544,279,227.54
  5. Step 5: Solve for x
    x = 120,544,279,227.54/399,782.92
  6. Step 6: Final answer
    x = 301,524.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.