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Finding the Third Proportional to 172,017 and 260,621

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Solution

The third proportional to 172,017 and 260,621 is: 394,863.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,017 : 260,621 = 260,621 : x
  2. Step 2: Convert to fraction form
    172,017/260,621 = 260,621/x
  3. Step 3: Cross multiply
    172,017x = 260,621 × 260,621
  4. Step 4: Simplify right side
    172,017x = 67,923,305,641
  5. Step 5: Solve for x
    x = 67,923,305,641/172,017
  6. Step 6: Final answer
    x = 394,863.91

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.