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Finding the Third Proportional to 2,759 and 3,161

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Solution

The third proportional to 2,759 and 3,161 is: 3,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759 : 3,161 = 3,161 : x
  2. Step 2: Convert to fraction form
    2,759/3,161 = 3,161/x
  3. Step 3: Cross multiply
    2,759x = 3,161 × 3,161
  4. Step 4: Simplify right side
    2,759x = 9,991,921
  5. Step 5: Solve for x
    x = 9,991,921/2,759
  6. Step 6: Final answer
    x = 3,621.57

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.