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Finding the Fourth Proportional to 724.42, 1,087.50 and 481.42

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Solution

The fourth proportional to 724.42, 1,087.50 and 481.42 is: 722.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.42 : 1,087.50 = 481.42 : x
  2. Step 2: Convert to fraction form
    724.42/1,087.50 = 481.42/x
  3. Step 3: Cross multiply
    724.42x = 1,087.50 × 481.42
  4. Step 4: Simplify right side
    724.42x = 523,544.25
  5. Step 5: Solve for x
    x = 523,544.25/724.42
  6. Step 6: Final answer
    x = 722.71

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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.