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Finding the Fourth Proportional to 580.88, 871.68 and 426.43

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Solution

The fourth proportional to 580.88, 871.68 and 426.43 is: 639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.88 : 871.68 = 426.43 : x
  2. Step 2: Convert to fraction form
    580.88/871.68 = 426.43/x
  3. Step 3: Cross multiply
    580.88x = 871.68 × 426.43
  4. Step 4: Simplify right side
    580.88x = 371,706.14
  5. Step 5: Solve for x
    x = 371,706.14/580.88
  6. Step 6: Final answer
    x = 639.90

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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.