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Finding the Third Proportional to 210,838 and 326,109

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Solution

The third proportional to 210,838 and 326,109 is: 504,401.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,838 : 326,109 = 326,109 : x
  2. Step 2: Convert to fraction form
    210,838/326,109 = 326,109/x
  3. Step 3: Cross multiply
    210,838x = 326,109 × 326,109
  4. Step 4: Simplify right side
    210,838x = 106,347,079,881
  5. Step 5: Solve for x
    x = 106,347,079,881/210,838
  6. Step 6: Final answer
    x = 504,401.86

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.