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Finding the Third Proportional to 267,638 and 414,904

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Solution

The third proportional to 267,638 and 414,904 is: 643,202.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,638 : 414,904 = 414,904 : x
  2. Step 2: Convert to fraction form
    267,638/414,904 = 414,904/x
  3. Step 3: Cross multiply
    267,638x = 414,904 × 414,904
  4. Step 4: Simplify right side
    267,638x = 172,145,329,216
  5. Step 5: Solve for x
    x = 172,145,329,216/267,638
  6. Step 6: Final answer
    x = 643,202.12

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.