Home / 3,387.25-5,081.69-1,078.75

Finding the Fourth Proportional to 3,387.25, 5,081.69 and 1,078.75

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Solution

The fourth proportional to 3,387.25, 5,081.69 and 1,078.75 is: 1,618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.25 : 5,081.69 = 1,078.75 : x
  2. Step 2: Convert to fraction form
    3,387.25/5,081.69 = 1,078.75/x
  3. Step 3: Cross multiply
    3,387.25x = 5,081.69 × 1,078.75
  4. Step 4: Simplify right side
    3,387.25x = 5,481,873.09
  5. Step 5: Solve for x
    x = 5,481,873.09/3,387.25
  6. Step 6: Final answer
    x = 1,618.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.