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Finding the Third Proportional to 644 and 762

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Solution

The third proportional to 644 and 762 is: 901.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    644 : 762 = 762 : x
  2. Step 2: Convert to fraction form
    644/762 = 762/x
  3. Step 3: Cross multiply
    644x = 762 × 762
  4. Step 4: Simplify right side
    644x = 580,644
  5. Step 5: Solve for x
    x = 580,644/644
  6. Step 6: Final answer
    x = 901.62

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.