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Finding the Third Proportional to 172,217 and 364,921

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Solution

The third proportional to 172,217 and 364,921 is: 773,253.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,217 : 364,921 = 364,921 : x
  2. Step 2: Convert to fraction form
    172,217/364,921 = 364,921/x
  3. Step 3: Cross multiply
    172,217x = 364,921 × 364,921
  4. Step 4: Simplify right side
    172,217x = 133,167,336,241
  5. Step 5: Solve for x
    x = 133,167,336,241/172,217
  6. Step 6: Final answer
    x = 773,253.14

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.