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Finding the Third Proportional to 172,921.50 and 372,519

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Solution

The third proportional to 172,921.50 and 372,519 is: 802,505.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,921.50 : 372,519 = 372,519 : x
  2. Step 2: Convert to fraction form
    172,921.50/372,519 = 372,519/x
  3. Step 3: Cross multiply
    172,921.50x = 372,519 × 372,519
  4. Step 4: Simplify right side
    172,921.50x = 138,770,405,361
  5. Step 5: Solve for x
    x = 138,770,405,361/172,921.50
  6. Step 6: Final answer
    x = 802,505.21

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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.