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Finding the Fourth Proportional to 5,305.44, 7,321.76 and 2,947.60

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Solution

The fourth proportional to 5,305.44, 7,321.76 and 2,947.60 is: 4,067.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,305.44 : 7,321.76 = 2,947.60 : x
  2. Step 2: Convert to fraction form
    5,305.44/7,321.76 = 2,947.60/x
  3. Step 3: Cross multiply
    5,305.44x = 7,321.76 × 2,947.60
  4. Step 4: Simplify right side
    5,305.44x = 21,581,619.78
  5. Step 5: Solve for x
    x = 21,581,619.78/5,305.44
  6. Step 6: Final answer
    x = 4,067.83

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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.