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Finding the Third Proportional to 313,872 and 644,268

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Solution

The third proportional to 313,872 and 644,268 is: 1,322,453.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,872 : 644,268 = 644,268 : x
  2. Step 2: Convert to fraction form
    313,872/644,268 = 644,268/x
  3. Step 3: Cross multiply
    313,872x = 644,268 × 644,268
  4. Step 4: Simplify right side
    313,872x = 415,081,255,824
  5. Step 5: Solve for x
    x = 415,081,255,824/313,872
  6. Step 6: Final answer
    x = 1,322,453.92

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.