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Finding the Third Proportional to 1,918.13 and 3,912.19

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Solution

The third proportional to 1,918.13 and 3,912.19 is: 7,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.13 : 3,912.19 = 3,912.19 : x
  2. Step 2: Convert to fraction form
    1,918.13/3,912.19 = 3,912.19/x
  3. Step 3: Cross multiply
    1,918.13x = 3,912.19 × 3,912.19
  4. Step 4: Simplify right side
    1,918.13x = 15,305,211.04
  5. Step 5: Solve for x
    x = 15,305,211.04/1,918.13
  6. Step 6: Final answer
    x = 7,979.26

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.