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Finding the Third Proportional to 138,940 and 215,273

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Solution

The third proportional to 138,940 and 215,273 is: 333,543.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,940 : 215,273 = 215,273 : x
  2. Step 2: Convert to fraction form
    138,940/215,273 = 215,273/x
  3. Step 3: Cross multiply
    138,940x = 215,273 × 215,273
  4. Step 4: Simplify right side
    138,940x = 46,342,464,529
  5. Step 5: Solve for x
    x = 46,342,464,529/138,940
  6. Step 6: Final answer
    x = 333,543.00

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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.