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Finding the Third Proportional to 310,842 and 679,986

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Solution

The third proportional to 310,842 and 679,986 is: 1,487,511.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,842 : 679,986 = 679,986 : x
  2. Step 2: Convert to fraction form
    310,842/679,986 = 679,986/x
  3. Step 3: Cross multiply
    310,842x = 679,986 × 679,986
  4. Step 4: Simplify right side
    310,842x = 462,380,960,196
  5. Step 5: Solve for x
    x = 462,380,960,196/310,842
  6. Step 6: Final answer
    x = 1,487,511.21

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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.