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Finding the Third Proportional to 2,687 and 3,611

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Solution

The third proportional to 2,687 and 3,611 is: 4,852.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687 : 3,611 = 3,611 : x
  2. Step 2: Convert to fraction form
    2,687/3,611 = 3,611/x
  3. Step 3: Cross multiply
    2,687x = 3,611 × 3,611
  4. Step 4: Simplify right side
    2,687x = 13,039,321
  5. Step 5: Solve for x
    x = 13,039,321/2,687
  6. Step 6: Final answer
    x = 4,852.74

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.