Home / 3,105.28-4,286.72-2,321.92

Finding the Fourth Proportional to 3,105.28, 4,286.72 and 2,321.92

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Solution

The fourth proportional to 3,105.28, 4,286.72 and 2,321.92 is: 3,205.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.28 : 4,286.72 = 2,321.92 : x
  2. Step 2: Convert to fraction form
    3,105.28/4,286.72 = 2,321.92/x
  3. Step 3: Cross multiply
    3,105.28x = 4,286.72 × 2,321.92
  4. Step 4: Simplify right side
    3,105.28x = 9,953,420.90
  5. Step 5: Solve for x
    x = 9,953,420.90/3,105.28
  6. Step 6: Final answer
    x = 3,205.32

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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.