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Finding the Fourth Proportional to 3,517.44, 5,275.68 and 920.56

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Solution

The fourth proportional to 3,517.44, 5,275.68 and 920.56 is: 1,380.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,517.44 : 5,275.68 = 920.56 : x
  2. Step 2: Convert to fraction form
    3,517.44/5,275.68 = 920.56/x
  3. Step 3: Cross multiply
    3,517.44x = 5,275.68 × 920.56
  4. Step 4: Simplify right side
    3,517.44x = 4,856,579.98
  5. Step 5: Solve for x
    x = 4,856,579.98/3,517.44
  6. Step 6: Final answer
    x = 1,380.71

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1.5x scale

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.