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Finding the Third Proportional to 128,078 and 275,884

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Solution

The third proportional to 128,078 and 275,884 is: 594,262.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,078 : 275,884 = 275,884 : x
  2. Step 2: Convert to fraction form
    128,078/275,884 = 275,884/x
  3. Step 3: Cross multiply
    128,078x = 275,884 × 275,884
  4. Step 4: Simplify right side
    128,078x = 76,111,981,456
  5. Step 5: Solve for x
    x = 76,111,981,456/128,078
  6. Step 6: Final answer
    x = 594,262.73

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.