Home / 2,785.75-4,179.38-1,120.38

Finding the Fourth Proportional to 2,785.75, 4,179.38 and 1,120.38

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Solution

The fourth proportional to 2,785.75, 4,179.38 and 1,120.38 is: 1,680.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.75 : 4,179.38 = 1,120.38 : x
  2. Step 2: Convert to fraction form
    2,785.75/4,179.38 = 1,120.38/x
  3. Step 3: Cross multiply
    2,785.75x = 4,179.38 × 1,120.38
  4. Step 4: Simplify right side
    2,785.75x = 4,682,480.89
  5. Step 5: Solve for x
    x = 4,682,480.89/2,785.75
  6. Step 6: Final answer
    x = 1,680.87

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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.