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Finding the Third Proportional to 641 and 1,234

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Solution

The third proportional to 641 and 1,234 is: 2,375.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    641 : 1,234 = 1,234 : x
  2. Step 2: Convert to fraction form
    641/1,234 = 1,234/x
  3. Step 3: Cross multiply
    641x = 1,234 × 1,234
  4. Step 4: Simplify right side
    641x = 1,522,756
  5. Step 5: Solve for x
    x = 1,522,756/641
  6. Step 6: Final answer
    x = 2,375.59

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.