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Finding the Fourth Proportional to 399,423.78, 551,208.57 and 227,333.31

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Solution

The fourth proportional to 399,423.78, 551,208.57 and 227,333.31 is: 313,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,423.78 : 551,208.57 = 227,333.31 : x
  2. Step 2: Convert to fraction form
    399,423.78/551,208.57 = 227,333.31/x
  3. Step 3: Cross multiply
    399,423.78x = 551,208.57 × 227,333.31
  4. Step 4: Simplify right side
    399,423.78x = 125,308,068,718.47
  5. Step 5: Solve for x
    x = 125,308,068,718.47/399,423.78
  6. Step 6: Final answer
    x = 313,722.10

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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.