Home / 3,286.80-4,930.20-3,107.60

Finding the Fourth Proportional to 3,286.80, 4,930.20 and 3,107.60

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Solution

The fourth proportional to 3,286.80, 4,930.20 and 3,107.60 is: 4,661.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.80 : 4,930.20 = 3,107.60 : x
  2. Step 2: Convert to fraction form
    3,286.80/4,930.20 = 3,107.60/x
  3. Step 3: Cross multiply
    3,286.80x = 4,930.20 × 3,107.60
  4. Step 4: Simplify right side
    3,286.80x = 15,321,089.52
  5. Step 5: Solve for x
    x = 15,321,089.52/3,286.80
  6. Step 6: Final answer
    x = 4,661.40

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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.