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Finding the Third Proportional to 138,591 and 299,340

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Solution

The third proportional to 138,591 and 299,340 is: 646,538.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,591 : 299,340 = 299,340 : x
  2. Step 2: Convert to fraction form
    138,591/299,340 = 299,340/x
  3. Step 3: Cross multiply
    138,591x = 299,340 × 299,340
  4. Step 4: Simplify right side
    138,591x = 89,604,435,600
  5. Step 5: Solve for x
    x = 89,604,435,600/138,591
  6. Step 6: Final answer
    x = 646,538.63

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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.