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Finding the Third Proportional to 221,739 and 486,401

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Solution

The third proportional to 221,739 and 486,401 is: 1,066,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,739 : 486,401 = 486,401 : x
  2. Step 2: Convert to fraction form
    221,739/486,401 = 486,401/x
  3. Step 3: Cross multiply
    221,739x = 486,401 × 486,401
  4. Step 4: Simplify right side
    221,739x = 236,585,932,801
  5. Step 5: Solve for x
    x = 236,585,932,801/221,739
  6. Step 6: Final answer
    x = 1,066,956.80

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.