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Finding the Third Proportional to 169.50 and 331.78

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Solution

The third proportional to 169.50 and 331.78 is: 649.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.50 : 331.78 = 331.78 : x
  2. Step 2: Convert to fraction form
    169.50/331.78 = 331.78/x
  3. Step 3: Cross multiply
    169.50x = 331.78 × 331.78
  4. Step 4: Simplify right side
    169.50x = 110,078.80
  5. Step 5: Solve for x
    x = 110,078.80/169.50
  6. Step 6: Final answer
    x = 649.43

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Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.