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Finding the Fourth Proportional to 725.01, 1,087.15 and 231.35

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Solution

The fourth proportional to 725.01, 1,087.15 and 231.35 is: 346.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.01 : 1,087.15 = 231.35 : x
  2. Step 2: Convert to fraction form
    725.01/1,087.15 = 231.35/x
  3. Step 3: Cross multiply
    725.01x = 1,087.15 × 231.35
  4. Step 4: Simplify right side
    725.01x = 251,508.57
  5. Step 5: Solve for x
    x = 251,508.57/725.01
  6. Step 6: Final answer
    x = 346.91

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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.