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Finding the Third Proportional to 409 and 879.25

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Solution

The third proportional to 409 and 879.25 is: 1,890.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    409 : 879.25 = 879.25 : x
  2. Step 2: Convert to fraction form
    409/879.25 = 879.25/x
  3. Step 3: Cross multiply
    409x = 879.25 × 879.25
  4. Step 4: Simplify right side
    409x = 773,080.56
  5. Step 5: Solve for x
    x = 773,080.56/409
  6. Step 6: Final answer
    x = 1,890.17

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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.