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Finding the Third Proportional to 138,534 and 299,220

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Solution

The third proportional to 138,534 and 299,220 is: 646,286.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,534 : 299,220 = 299,220 : x
  2. Step 2: Convert to fraction form
    138,534/299,220 = 299,220/x
  3. Step 3: Cross multiply
    138,534x = 299,220 × 299,220
  4. Step 4: Simplify right side
    138,534x = 89,532,608,400
  5. Step 5: Solve for x
    x = 89,532,608,400/138,534
  6. Step 6: Final answer
    x = 646,286.17

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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.