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Finding the Fourth Proportional to 725.33, 1,087.98 and 238.41

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Solution

The fourth proportional to 725.33, 1,087.98 and 238.41 is: 357.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.33 : 1,087.98 = 238.41 : x
  2. Step 2: Convert to fraction form
    725.33/1,087.98 = 238.41/x
  3. Step 3: Cross multiply
    725.33x = 1,087.98 × 238.41
  4. Step 4: Simplify right side
    725.33x = 259,385.31
  5. Step 5: Solve for x
    x = 259,385.31/725.33
  6. Step 6: Final answer
    x = 357.61

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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.