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Finding the Fourth Proportional to 399,874.56, 551,843.64 and 230,109.36

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Solution

The fourth proportional to 399,874.56, 551,843.64 and 230,109.36 is: 317,560.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,874.56 : 551,843.64 = 230,109.36 : x
  2. Step 2: Convert to fraction form
    399,874.56/551,843.64 = 230,109.36/x
  3. Step 3: Cross multiply
    399,874.56x = 551,843.64 × 230,109.36
  4. Step 4: Simplify right side
    399,874.56x = 126,984,386,820.47
  5. Step 5: Solve for x
    x = 126,984,386,820.47/399,874.56
  6. Step 6: Final answer
    x = 317,560.55

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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.