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Finding the Third Proportional to 218.81 and 327.94

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Solution

The third proportional to 218.81 and 327.94 is: 491.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.81 : 327.94 = 327.94 : x
  2. Step 2: Convert to fraction form
    218.81/327.94 = 327.94/x
  3. Step 3: Cross multiply
    218.81x = 327.94 × 327.94
  4. Step 4: Simplify right side
    218.81x = 107,543.00
  5. Step 5: Solve for x
    x = 107,543.00/218.81
  6. Step 6: Final answer
    x = 491.48

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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.