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Finding the Third Proportional to 6,689 and 7,625

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Solution

The third proportional to 6,689 and 7,625 is: 8,691.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,689 : 7,625 = 7,625 : x
  2. Step 2: Convert to fraction form
    6,689/7,625 = 7,625/x
  3. Step 3: Cross multiply
    6,689x = 7,625 × 7,625
  4. Step 4: Simplify right side
    6,689x = 58,140,625
  5. Step 5: Solve for x
    x = 58,140,625/6,689
  6. Step 6: Final answer
    x = 8,691.98

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.