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Finding the Third Proportional to 314,690 and 679,636

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Solution

The third proportional to 314,690 and 679,636 is: 1,467,809.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,690 : 679,636 = 679,636 : x
  2. Step 2: Convert to fraction form
    314,690/679,636 = 679,636/x
  3. Step 3: Cross multiply
    314,690x = 679,636 × 679,636
  4. Step 4: Simplify right side
    314,690x = 461,905,092,496
  5. Step 5: Solve for x
    x = 461,905,092,496/314,690
  6. Step 6: Final answer
    x = 1,467,809.88

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.