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Finding the Third Proportional to 138,489 and 306,040.50

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Solution

The third proportional to 138,489 and 306,040.50 is: 676,304.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,489 : 306,040.50 = 306,040.50 : x
  2. Step 2: Convert to fraction form
    138,489/306,040.50 = 306,040.50/x
  3. Step 3: Cross multiply
    138,489x = 306,040.50 × 306,040.50
  4. Step 4: Simplify right side
    138,489x = 93,660,787,640.25
  5. Step 5: Solve for x
    x = 93,660,787,640.25/138,489
  6. Step 6: Final answer
    x = 676,304.89

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.