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Finding the Third Proportional to 2,761 and 3,931

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Solution

The third proportional to 2,761 and 3,931 is: 5,596.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761 : 3,931 = 3,931 : x
  2. Step 2: Convert to fraction form
    2,761/3,931 = 3,931/x
  3. Step 3: Cross multiply
    2,761x = 3,931 × 3,931
  4. Step 4: Simplify right side
    2,761x = 15,452,761
  5. Step 5: Solve for x
    x = 15,452,761/2,761
  6. Step 6: Final answer
    x = 5,596.80

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.