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Finding the Fourth Proportional to 2,626.26, 3,939.57 and 871.18

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Solution

The fourth proportional to 2,626.26, 3,939.57 and 871.18 is: 1,306.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,626.26 : 3,939.57 = 871.18 : x
  2. Step 2: Convert to fraction form
    2,626.26/3,939.57 = 871.18/x
  3. Step 3: Cross multiply
    2,626.26x = 3,939.57 × 871.18
  4. Step 4: Simplify right side
    2,626.26x = 3,432,074.59
  5. Step 5: Solve for x
    x = 3,432,074.59/2,626.26
  6. Step 6: Final answer
    x = 1,306.83

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1.5x scale

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.