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Finding the Third Proportional to 172,923 and 259,385

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Solution

The third proportional to 172,923 and 259,385 is: 389,078.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,923 : 259,385 = 259,385 : x
  2. Step 2: Convert to fraction form
    172,923/259,385 = 259,385/x
  3. Step 3: Cross multiply
    172,923x = 259,385 × 259,385
  4. Step 4: Simplify right side
    172,923x = 67,280,578,225
  5. Step 5: Solve for x
    x = 67,280,578,225/172,923
  6. Step 6: Final answer
    x = 389,078.25

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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.