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Finding the Fourth Proportional to 5,422.60, 7,474.44 and 3,928.48

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Solution

The fourth proportional to 5,422.60, 7,474.44 and 3,928.48 is: 5,414.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.60 : 7,474.44 = 3,928.48 : x
  2. Step 2: Convert to fraction form
    5,422.60/7,474.44 = 3,928.48/x
  3. Step 3: Cross multiply
    5,422.60x = 7,474.44 × 3,928.48
  4. Step 4: Simplify right side
    5,422.60x = 29,363,188.05
  5. Step 5: Solve for x
    x = 29,363,188.05/5,422.60
  6. Step 6: Final answer
    x = 5,414.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.