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Finding the Fourth Proportional to 721.88, 1,082.74 and 337.12

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Solution

The fourth proportional to 721.88, 1,082.74 and 337.12 is: 505.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.88 : 1,082.74 = 337.12 : x
  2. Step 2: Convert to fraction form
    721.88/1,082.74 = 337.12/x
  3. Step 3: Cross multiply
    721.88x = 1,082.74 × 337.12
  4. Step 4: Simplify right side
    721.88x = 365,013.31
  5. Step 5: Solve for x
    x = 365,013.31/721.88
  6. Step 6: Final answer
    x = 505.64

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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.