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Finding the Third Proportional to 1,115.44 and 1,672.31

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Solution

The third proportional to 1,115.44 and 1,672.31 is: 2,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.44 : 1,672.31 = 1,672.31 : x
  2. Step 2: Convert to fraction form
    1,115.44/1,672.31 = 1,672.31/x
  3. Step 3: Cross multiply
    1,115.44x = 1,672.31 × 1,672.31
  4. Step 4: Simplify right side
    1,115.44x = 2,796,629.10
  5. Step 5: Solve for x
    x = 2,796,629.10/1,115.44
  6. Step 6: Final answer
    x = 2,507.20

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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.