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Finding the Third Proportional to 138,728 and 299,308

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Solution

The third proportional to 138,728 and 299,308 is: 645,762.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,728 : 299,308 = 299,308 : x
  2. Step 2: Convert to fraction form
    138,728/299,308 = 299,308/x
  3. Step 3: Cross multiply
    138,728x = 299,308 × 299,308
  4. Step 4: Simplify right side
    138,728x = 89,585,278,864
  5. Step 5: Solve for x
    x = 89,585,278,864/138,728
  6. Step 6: Final answer
    x = 645,762.06

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.