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Finding the Fourth Proportional to 399,562.80, 551,402.82 and 218,273.46

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Solution

The fourth proportional to 399,562.80, 551,402.82 and 218,273.46 is: 301,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,562.80 : 551,402.82 = 218,273.46 : x
  2. Step 2: Convert to fraction form
    399,562.80/551,402.82 = 218,273.46/x
  3. Step 3: Cross multiply
    399,562.80x = 551,402.82 × 218,273.46
  4. Step 4: Simplify right side
    399,562.80x = 120,356,601,375.16
  5. Step 5: Solve for x
    x = 120,356,601,375.16/399,562.80
  6. Step 6: Final answer
    x = 301,220.74

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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.