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Finding the Third Proportional to 1,920.38 and 3,140.44

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Solution

The third proportional to 1,920.38 and 3,140.44 is: 5,135.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.38 : 3,140.44 = 3,140.44 : x
  2. Step 2: Convert to fraction form
    1,920.38/3,140.44 = 3,140.44/x
  3. Step 3: Cross multiply
    1,920.38x = 3,140.44 × 3,140.44
  4. Step 4: Simplify right side
    1,920.38x = 9,862,347.69
  5. Step 5: Solve for x
    x = 9,862,347.69/1,920.38
  6. Step 6: Final answer
    x = 5,135.64

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.