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Finding the Fourth Proportional to 874.27, 1,309.50 and 548.04

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Solution

The fourth proportional to 874.27, 1,309.50 and 548.04 is: 820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.27 : 1,309.50 = 548.04 : x
  2. Step 2: Convert to fraction form
    874.27/1,309.50 = 548.04/x
  3. Step 3: Cross multiply
    874.27x = 1,309.50 × 548.04
  4. Step 4: Simplify right side
    874.27x = 717,658.38
  5. Step 5: Solve for x
    x = 717,658.38/874.27
  6. Step 6: Final answer
    x = 820.87

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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.