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Finding the Fourth Proportional to 3,255.59, 4,491.86 and 1,928.21

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Solution

The fourth proportional to 3,255.59, 4,491.86 and 1,928.21 is: 2,660.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,255.59 : 4,491.86 = 1,928.21 : x
  2. Step 2: Convert to fraction form
    3,255.59/4,491.86 = 1,928.21/x
  3. Step 3: Cross multiply
    3,255.59x = 4,491.86 × 1,928.21
  4. Step 4: Simplify right side
    3,255.59x = 8,661,217.27
  5. Step 5: Solve for x
    x = 8,661,217.27/3,255.59
  6. Step 6: Final answer
    x = 2,660.41

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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.