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Finding the Third Proportional to 679,939 and 1,479,987

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Solution

The third proportional to 679,939 and 1,479,987 is: 3,221,408.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,939 : 1,479,987 = 1,479,987 : x
  2. Step 2: Convert to fraction form
    679,939/1,479,987 = 1,479,987/x
  3. Step 3: Cross multiply
    679,939x = 1,479,987 × 1,479,987
  4. Step 4: Simplify right side
    679,939x = 2,190,361,520,169
  5. Step 5: Solve for x
    x = 2,190,361,520,169/679,939
  6. Step 6: Final answer
    x = 3,221,408.86

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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.