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Finding the Third Proportional to 912.38 and 1,391.44

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Solution

The third proportional to 912.38 and 1,391.44 is: 2,122.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.38 : 1,391.44 = 1,391.44 : x
  2. Step 2: Convert to fraction form
    912.38/1,391.44 = 1,391.44/x
  3. Step 3: Cross multiply
    912.38x = 1,391.44 × 1,391.44
  4. Step 4: Simplify right side
    912.38x = 1,936,098.32
  5. Step 5: Solve for x
    x = 1,936,098.32/912.38
  6. Step 6: Final answer
    x = 2,122.04

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.