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Finding the Fourth Proportional to 721.14, 1,082.10 and 504.30

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Solution

The fourth proportional to 721.14, 1,082.10 and 504.30 is: 756.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.14 : 1,082.10 = 504.30 : x
  2. Step 2: Convert to fraction form
    721.14/1,082.10 = 504.30/x
  3. Step 3: Cross multiply
    721.14x = 1,082.10 × 504.30
  4. Step 4: Simplify right side
    721.14x = 545,703.03
  5. Step 5: Solve for x
    x = 545,703.03/721.14
  6. Step 6: Final answer
    x = 756.72

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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.