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Finding the Third Proportional to 319,853 and 679,072

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Solution

The third proportional to 319,853 and 679,072 is: 1,441,720.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,853 : 679,072 = 679,072 : x
  2. Step 2: Convert to fraction form
    319,853/679,072 = 679,072/x
  3. Step 3: Cross multiply
    319,853x = 679,072 × 679,072
  4. Step 4: Simplify right side
    319,853x = 461,138,781,184
  5. Step 5: Solve for x
    x = 461,138,781,184/319,853
  6. Step 6: Final answer
    x = 1,441,720.98

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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.