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Finding the Third Proportional to 1,187 and 2,611

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Solution

The third proportional to 1,187 and 2,611 is: 5,743.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187 : 2,611 = 2,611 : x
  2. Step 2: Convert to fraction form
    1,187/2,611 = 2,611/x
  3. Step 3: Cross multiply
    1,187x = 2,611 × 2,611
  4. Step 4: Simplify right side
    1,187x = 6,817,321
  5. Step 5: Solve for x
    x = 6,817,321/1,187
  6. Step 6: Final answer
    x = 5,743.32

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.