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Finding the Fourth Proportional to 399,569.41, 551,425.47 and 227,490.78

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Solution

The fourth proportional to 399,569.41, 551,425.47 and 227,490.78 is: 313,948.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,569.41 : 551,425.47 = 227,490.78 : x
  2. Step 2: Convert to fraction form
    399,569.41/551,425.47 = 227,490.78/x
  3. Step 3: Cross multiply
    399,569.41x = 551,425.47 × 227,490.78
  4. Step 4: Simplify right side
    399,569.41x = 125,444,209,144.71
  5. Step 5: Solve for x
    x = 125,444,209,144.71/399,569.41
  6. Step 6: Final answer
    x = 313,948.48

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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.