Home / 3,863.20-5,329.56-2,977.60

Finding the Fourth Proportional to 3,863.20, 5,329.56 and 2,977.60

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Solution

The fourth proportional to 3,863.20, 5,329.56 and 2,977.60 is: 4,107.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,863.20 : 5,329.56 = 2,977.60 : x
  2. Step 2: Convert to fraction form
    3,863.20/5,329.56 = 2,977.60/x
  3. Step 3: Cross multiply
    3,863.20x = 5,329.56 × 2,977.60
  4. Step 4: Simplify right side
    3,863.20x = 15,869,297.86
  5. Step 5: Solve for x
    x = 15,869,297.86/3,863.20
  6. Step 6: Final answer
    x = 4,107.81

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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.