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Finding the Third Proportional to 198,318.38 and 289,170

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Solution

The third proportional to 198,318.38 and 289,170 is: 421,641.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,318.38 : 289,170 = 289,170 : x
  2. Step 2: Convert to fraction form
    198,318.38/289,170 = 289,170/x
  3. Step 3: Cross multiply
    198,318.38x = 289,170 × 289,170
  4. Step 4: Simplify right side
    198,318.38x = 83,619,288,900
  5. Step 5: Solve for x
    x = 83,619,288,900/198,318.38
  6. Step 6: Final answer
    x = 421,641.66

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.