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Finding the Third Proportional to 221,009 and 339,905

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Solution

The third proportional to 221,009 and 339,905 is: 522,763.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,009 : 339,905 = 339,905 : x
  2. Step 2: Convert to fraction form
    221,009/339,905 = 339,905/x
  3. Step 3: Cross multiply
    221,009x = 339,905 × 339,905
  4. Step 4: Simplify right side
    221,009x = 115,535,409,025
  5. Step 5: Solve for x
    x = 115,535,409,025/221,009
  6. Step 6: Final answer
    x = 522,763.37

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.