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Finding the Fourth Proportional to 488.32, 731.40 and 271.42

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Solution

The fourth proportional to 488.32, 731.40 and 271.42 is: 406.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.32 : 731.40 = 271.42 : x
  2. Step 2: Convert to fraction form
    488.32/731.40 = 271.42/x
  3. Step 3: Cross multiply
    488.32x = 731.40 × 271.42
  4. Step 4: Simplify right side
    488.32x = 198,516.59
  5. Step 5: Solve for x
    x = 198,516.59/488.32
  6. Step 6: Final answer
    x = 406.53

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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.