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Finding the Fourth Proportional to 663.28, 993.14 and 580.26

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Solution

The fourth proportional to 663.28, 993.14 and 580.26 is: 868.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.28 : 993.14 = 580.26 : x
  2. Step 2: Convert to fraction form
    663.28/993.14 = 580.26/x
  3. Step 3: Cross multiply
    663.28x = 993.14 × 580.26
  4. Step 4: Simplify right side
    663.28x = 576,279.42
  5. Step 5: Solve for x
    x = 576,279.42/663.28
  6. Step 6: Final answer
    x = 868.83

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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.