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Finding the Fourth Proportional to 724.83, 1,087.35 and 237.72

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Solution

The fourth proportional to 724.83, 1,087.35 and 237.72 is: 356.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.83 : 1,087.35 = 237.72 : x
  2. Step 2: Convert to fraction form
    724.83/1,087.35 = 237.72/x
  3. Step 3: Cross multiply
    724.83x = 1,087.35 × 237.72
  4. Step 4: Simplify right side
    724.83x = 258,484.84
  5. Step 5: Solve for x
    x = 258,484.84/724.83
  6. Step 6: Final answer
    x = 356.61

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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.