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Finding the Third Proportional to 213,957 and 331,305

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Solution

The third proportional to 213,957 and 331,305 is: 513,014.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,957 : 331,305 = 331,305 : x
  2. Step 2: Convert to fraction form
    213,957/331,305 = 331,305/x
  3. Step 3: Cross multiply
    213,957x = 331,305 × 331,305
  4. Step 4: Simplify right side
    213,957x = 109,763,003,025
  5. Step 5: Solve for x
    x = 109,763,003,025/213,957
  6. Step 6: Final answer
    x = 513,014.31

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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.