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Finding the Fourth Proportional to 580.05, 871.11 and 426.29

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Solution

The fourth proportional to 580.05, 871.11 and 426.29 is: 640.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.05 : 871.11 = 426.29 : x
  2. Step 2: Convert to fraction form
    580.05/871.11 = 426.29/x
  3. Step 3: Cross multiply
    580.05x = 871.11 × 426.29
  4. Step 4: Simplify right side
    580.05x = 371,341.13
  5. Step 5: Solve for x
    x = 371,341.13/580.05
  6. Step 6: Final answer
    x = 640.19

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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.