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Finding the Third Proportional to 218.25 and 327.38

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Solution

The third proportional to 218.25 and 327.38 is: 491.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.25 : 327.38 = 327.38 : x
  2. Step 2: Convert to fraction form
    218.25/327.38 = 327.38/x
  3. Step 3: Cross multiply
    218.25x = 327.38 × 327.38
  4. Step 4: Simplify right side
    218.25x = 107,174.39
  5. Step 5: Solve for x
    x = 107,174.39/218.25
  6. Step 6: Final answer
    x = 491.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.