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Finding the Fourth Proportional to 399,705.72, 551,625.35 and 227,630.97

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Solution

The fourth proportional to 399,705.72, 551,625.35 and 227,630.97 is: 314,148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,705.72 : 551,625.35 = 227,630.97 : x
  2. Step 2: Convert to fraction form
    399,705.72/551,625.35 = 227,630.97/x
  3. Step 3: Cross multiply
    399,705.72x = 551,625.35 × 227,630.97
  4. Step 4: Simplify right side
    399,705.72x = 125,567,012,358.94
  5. Step 5: Solve for x
    x = 125,567,012,358.94/399,705.72
  6. Step 6: Final answer
    x = 314,148.65

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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.