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Finding the Third Proportional to 267,870 and 405,261

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Solution

The third proportional to 267,870 and 405,261 is: 613,120.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,870 : 405,261 = 405,261 : x
  2. Step 2: Convert to fraction form
    267,870/405,261 = 405,261/x
  3. Step 3: Cross multiply
    267,870x = 405,261 × 405,261
  4. Step 4: Simplify right side
    267,870x = 164,236,478,121
  5. Step 5: Solve for x
    x = 164,236,478,121/267,870
  6. Step 6: Final answer
    x = 613,120.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.