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Finding the Third Proportional to 1,149.19 and 1,247.91

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Solution

The third proportional to 1,149.19 and 1,247.91 is: 1,355.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.19 : 1,247.91 = 1,247.91 : x
  2. Step 2: Convert to fraction form
    1,149.19/1,247.91 = 1,247.91/x
  3. Step 3: Cross multiply
    1,149.19x = 1,247.91 × 1,247.91
  4. Step 4: Simplify right side
    1,149.19x = 1,557,270.01
  5. Step 5: Solve for x
    x = 1,557,270.01/1,149.19
  6. Step 6: Final answer
    x = 1,355.11

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.