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Finding the Third Proportional to 172,845 and 259,272

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Solution

The third proportional to 172,845 and 259,272 is: 388,914.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,845 : 259,272 = 259,272 : x
  2. Step 2: Convert to fraction form
    172,845/259,272 = 259,272/x
  3. Step 3: Cross multiply
    172,845x = 259,272 × 259,272
  4. Step 4: Simplify right side
    172,845x = 67,221,969,984
  5. Step 5: Solve for x
    x = 67,221,969,984/172,845
  6. Step 6: Final answer
    x = 388,914.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.