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Finding the Third Proportional to 299,854 and 644,172

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Solution

The third proportional to 299,854 and 644,172 is: 1,383,865.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,854 : 644,172 = 644,172 : x
  2. Step 2: Convert to fraction form
    299,854/644,172 = 644,172/x
  3. Step 3: Cross multiply
    299,854x = 644,172 × 644,172
  4. Step 4: Simplify right side
    299,854x = 414,957,565,584
  5. Step 5: Solve for x
    x = 414,957,565,584/299,854
  6. Step 6: Final answer
    x = 1,383,865.37

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.