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Finding the Third Proportional to 207,687 and 311,181

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Solution

The third proportional to 207,687 and 311,181 is: 466,247.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,687 : 311,181 = 311,181 : x
  2. Step 2: Convert to fraction form
    207,687/311,181 = 311,181/x
  3. Step 3: Cross multiply
    207,687x = 311,181 × 311,181
  4. Step 4: Simplify right side
    207,687x = 96,833,614,761
  5. Step 5: Solve for x
    x = 96,833,614,761/207,687
  6. Step 6: Final answer
    x = 466,247.84

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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.