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Finding the Third Proportional to 172,640 and 262,563

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Solution

The third proportional to 172,640 and 262,563 is: 399,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,640 : 262,563 = 262,563 : x
  2. Step 2: Convert to fraction form
    172,640/262,563 = 262,563/x
  3. Step 3: Cross multiply
    172,640x = 262,563 × 262,563
  4. Step 4: Simplify right side
    172,640x = 68,939,328,969
  5. Step 5: Solve for x
    x = 68,939,328,969/172,640
  6. Step 6: Final answer
    x = 399,324.19

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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.