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Finding the Third Proportional to 198.75 and 363.75

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Solution

The third proportional to 198.75 and 363.75 is: 665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.75 : 363.75 = 363.75 : x
  2. Step 2: Convert to fraction form
    198.75/363.75 = 363.75/x
  3. Step 3: Cross multiply
    198.75x = 363.75 × 363.75
  4. Step 4: Simplify right side
    198.75x = 132,314.06
  5. Step 5: Solve for x
    x = 132,314.06/198.75
  6. Step 6: Final answer
    x = 665.73

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Why These Related Problems?

These problems maintain the same ratio (1.83) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.