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Finding the Fourth Proportional to 721.52, 1,082.25 and 310.76

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Solution

The fourth proportional to 721.52, 1,082.25 and 310.76 is: 466.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.52 : 1,082.25 = 310.76 : x
  2. Step 2: Convert to fraction form
    721.52/1,082.25 = 310.76/x
  3. Step 3: Cross multiply
    721.52x = 1,082.25 × 310.76
  4. Step 4: Simplify right side
    721.52x = 336,314.60
  5. Step 5: Solve for x
    x = 336,314.60/721.52
  6. Step 6: Final answer
    x = 466.12

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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.