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Finding the Third Proportional to 316,252 and 690,872

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Solution

The third proportional to 316,252 and 690,872 is: 1,509,252.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,252 : 690,872 = 690,872 : x
  2. Step 2: Convert to fraction form
    316,252/690,872 = 690,872/x
  3. Step 3: Cross multiply
    316,252x = 690,872 × 690,872
  4. Step 4: Simplify right side
    316,252x = 477,304,120,384
  5. Step 5: Solve for x
    x = 477,304,120,384/316,252
  6. Step 6: Final answer
    x = 1,509,252.50

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.