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Finding the Fourth Proportional to 399,425.78, 551,211.32 and 227,335.30

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Solution

The fourth proportional to 399,425.78, 551,211.32 and 227,335.30 is: 313,724.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,425.78 : 551,211.32 = 227,335.30 : x
  2. Step 2: Convert to fraction form
    399,425.78/551,211.32 = 227,335.30/x
  3. Step 3: Cross multiply
    399,425.78x = 551,211.32 × 227,335.30
  4. Step 4: Simplify right side
    399,425.78x = 125,309,790,795.60
  5. Step 5: Solve for x
    x = 125,309,790,795.60/399,425.78
  6. Step 6: Final answer
    x = 313,724.84

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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.