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Finding the Fourth Proportional to 724.74, 1,087.00 and 237.79

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Solution

The fourth proportional to 724.74, 1,087.00 and 237.79 is: 356.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.74 : 1,087.00 = 237.79 : x
  2. Step 2: Convert to fraction form
    724.74/1,087.00 = 237.79/x
  3. Step 3: Cross multiply
    724.74x = 1,087.00 × 237.79
  4. Step 4: Simplify right side
    724.74x = 258,474.42
  5. Step 5: Solve for x
    x = 258,474.42/724.74
  6. Step 6: Final answer
    x = 356.64

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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.