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Finding the Fourth Proportional to 725.05, 1,087.22 and 237.94

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Solution

The fourth proportional to 725.05, 1,087.22 and 237.94 is: 356.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.05 : 1,087.22 = 237.94 : x
  2. Step 2: Convert to fraction form
    725.05/1,087.22 = 237.94/x
  3. Step 3: Cross multiply
    725.05x = 1,087.22 × 237.94
  4. Step 4: Simplify right side
    725.05x = 258,691.00
  5. Step 5: Solve for x
    x = 258,691.00/725.05
  6. Step 6: Final answer
    x = 356.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.