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Finding the Third Proportional to 310,721 and 680,725

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Solution

The third proportional to 310,721 and 680,725 is: 1,491,326.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,721 : 680,725 = 680,725 : x
  2. Step 2: Convert to fraction form
    310,721/680,725 = 680,725/x
  3. Step 3: Cross multiply
    310,721x = 680,725 × 680,725
  4. Step 4: Simplify right side
    310,721x = 463,386,525,625
  5. Step 5: Solve for x
    x = 463,386,525,625/310,721
  6. Step 6: Final answer
    x = 1,491,326.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.