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Finding the Third Proportional to 218.67 and 349.73

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Solution

The third proportional to 218.67 and 349.73 is: 559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.67 : 349.73 = 349.73 : x
  2. Step 2: Convert to fraction form
    218.67/349.73 = 349.73/x
  3. Step 3: Cross multiply
    218.67x = 349.73 × 349.73
  4. Step 4: Simplify right side
    218.67x = 122,314.13
  5. Step 5: Solve for x
    x = 122,314.13/218.67
  6. Step 6: Final answer
    x = 559.35

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.