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Finding the Fourth Proportional to 399,872.56, 551,840.88 and 230,107.36

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Solution

The fourth proportional to 399,872.56, 551,840.88 and 230,107.36 is: 317,557.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,872.56 : 551,840.88 = 230,107.36 : x
  2. Step 2: Convert to fraction form
    399,872.56/551,840.88 = 230,107.36/x
  3. Step 3: Cross multiply
    399,872.56x = 551,840.88 × 230,107.36
  4. Step 4: Simplify right side
    399,872.56x = 126,982,648,036.88
  5. Step 5: Solve for x
    x = 126,982,648,036.88/399,872.56
  6. Step 6: Final answer
    x = 317,557.79

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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.