Home / 3,391.28-5,085.40-1,415.44

Finding the Fourth Proportional to 3,391.28, 5,085.40 and 1,415.44

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Solution

The fourth proportional to 3,391.28, 5,085.40 and 1,415.44 is: 2,122.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.28 : 5,085.40 = 1,415.44 : x
  2. Step 2: Convert to fraction form
    3,391.28/5,085.40 = 1,415.44/x
  3. Step 3: Cross multiply
    3,391.28x = 5,085.40 × 1,415.44
  4. Step 4: Simplify right side
    3,391.28x = 7,198,078.58
  5. Step 5: Solve for x
    x = 7,198,078.58/3,391.28
  6. Step 6: Final answer
    x = 2,122.53

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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.