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Finding the Third Proportional to 2,591 and 2,987

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Solution

The third proportional to 2,591 and 2,987 is: 3,443.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,591 : 2,987 = 2,987 : x
  2. Step 2: Convert to fraction form
    2,591/2,987 = 2,987/x
  3. Step 3: Cross multiply
    2,591x = 2,987 × 2,987
  4. Step 4: Simplify right side
    2,591x = 8,922,169
  5. Step 5: Solve for x
    x = 8,922,169/2,591
  6. Step 6: Final answer
    x = 3,443.52

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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.