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Finding the Third Proportional to 168,390 and 371,916

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Solution

The third proportional to 168,390 and 371,916 is: 821,435.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,390 : 371,916 = 371,916 : x
  2. Step 2: Convert to fraction form
    168,390/371,916 = 371,916/x
  3. Step 3: Cross multiply
    168,390x = 371,916 × 371,916
  4. Step 4: Simplify right side
    168,390x = 138,321,511,056
  5. Step 5: Solve for x
    x = 138,321,511,056/168,390
  6. Step 6: Final answer
    x = 821,435.42

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.