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Finding the Third Proportional to 138,687 and 304,425

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Solution

The third proportional to 138,687 and 304,425 is: 668,228.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,687 : 304,425 = 304,425 : x
  2. Step 2: Convert to fraction form
    138,687/304,425 = 304,425/x
  3. Step 3: Cross multiply
    138,687x = 304,425 × 304,425
  4. Step 4: Simplify right side
    138,687x = 92,674,580,625
  5. Step 5: Solve for x
    x = 92,674,580,625/138,687
  6. Step 6: Final answer
    x = 668,228.32

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.