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Finding the Third Proportional to 138,256 and 291,266

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Solution

The third proportional to 138,256 and 291,266 is: 613,614.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,256 : 291,266 = 291,266 : x
  2. Step 2: Convert to fraction form
    138,256/291,266 = 291,266/x
  3. Step 3: Cross multiply
    138,256x = 291,266 × 291,266
  4. Step 4: Simplify right side
    138,256x = 84,835,882,756
  5. Step 5: Solve for x
    x = 84,835,882,756/138,256
  6. Step 6: Final answer
    x = 613,614.47

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.