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Finding the Fourth Proportional to 488.28, 731.20 and 282.18

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Solution

The fourth proportional to 488.28, 731.20 and 282.18 is: 422.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.28 : 731.20 = 282.18 : x
  2. Step 2: Convert to fraction form
    488.28/731.20 = 282.18/x
  3. Step 3: Cross multiply
    488.28x = 731.20 × 282.18
  4. Step 4: Simplify right side
    488.28x = 206,333.38
  5. Step 5: Solve for x
    x = 206,333.38/488.28
  6. Step 6: Final answer
    x = 422.57

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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.