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Finding the Third Proportional to 298,686 and 644,874

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Solution

The third proportional to 298,686 and 644,874 is: 1,392,306.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,686 : 644,874 = 644,874 : x
  2. Step 2: Convert to fraction form
    298,686/644,874 = 644,874/x
  3. Step 3: Cross multiply
    298,686x = 644,874 × 644,874
  4. Step 4: Simplify right side
    298,686x = 415,862,475,876
  5. Step 5: Solve for x
    x = 415,862,475,876/298,686
  6. Step 6: Final answer
    x = 1,392,306.56

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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.