Home / 3,863.90-5,785.46-3,178.84

Finding the Fourth Proportional to 3,863.90, 5,785.46 and 3,178.84

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Solution

The fourth proportional to 3,863.90, 5,785.46 and 3,178.84 is: 4,759.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,863.90 : 5,785.46 = 3,178.84 : x
  2. Step 2: Convert to fraction form
    3,863.90/5,785.46 = 3,178.84/x
  3. Step 3: Cross multiply
    3,863.90x = 5,785.46 × 3,178.84
  4. Step 4: Simplify right side
    3,863.90x = 18,391,022.74
  5. Step 5: Solve for x
    x = 18,391,022.74/3,863.90
  6. Step 6: Final answer
    x = 4,759.70

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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.