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Finding the Third Proportional to 1,209.75 and 2,581.25

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Solution

The third proportional to 1,209.75 and 2,581.25 is: 5,507.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.75 : 2,581.25 = 2,581.25 : x
  2. Step 2: Convert to fraction form
    1,209.75/2,581.25 = 2,581.25/x
  3. Step 3: Cross multiply
    1,209.75x = 2,581.25 × 2,581.25
  4. Step 4: Simplify right side
    1,209.75x = 6,662,851.56
  5. Step 5: Solve for x
    x = 6,662,851.56/1,209.75
  6. Step 6: Final answer
    x = 5,507.63

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.