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Finding the Third Proportional to 1,938.25 and 4,238.75

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Solution

The third proportional to 1,938.25 and 4,238.75 is: 9,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.25 : 4,238.75 = 4,238.75 : x
  2. Step 2: Convert to fraction form
    1,938.25/4,238.75 = 4,238.75/x
  3. Step 3: Cross multiply
    1,938.25x = 4,238.75 × 4,238.75
  4. Step 4: Simplify right side
    1,938.25x = 17,967,001.56
  5. Step 5: Solve for x
    x = 17,967,001.56/1,938.25
  6. Step 6: Final answer
    x = 9,269.70

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.