Home / 3,979.26-5,479.56-2,858.22

Finding the Fourth Proportional to 3,979.26, 5,479.56 and 2,858.22

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Solution

The fourth proportional to 3,979.26, 5,479.56 and 2,858.22 is: 3,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.26 : 5,479.56 = 2,858.22 : x
  2. Step 2: Convert to fraction form
    3,979.26/5,479.56 = 2,858.22/x
  3. Step 3: Cross multiply
    3,979.26x = 5,479.56 × 2,858.22
  4. Step 4: Simplify right side
    3,979.26x = 15,661,787.98
  5. Step 5: Solve for x
    x = 15,661,787.98/3,979.26
  6. Step 6: Final answer
    x = 3,935.85

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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.