Home / 3,979.72-5,494.40-2,801.98

Finding the Fourth Proportional to 3,979.72, 5,494.40 and 2,801.98

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Solution

The fourth proportional to 3,979.72, 5,494.40 and 2,801.98 is: 3,868.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.72 : 5,494.40 = 2,801.98 : x
  2. Step 2: Convert to fraction form
    3,979.72/5,494.40 = 2,801.98/x
  3. Step 3: Cross multiply
    3,979.72x = 5,494.40 × 2,801.98
  4. Step 4: Simplify right side
    3,979.72x = 15,395,198.91
  5. Step 5: Solve for x
    x = 15,395,198.91/3,979.72
  6. Step 6: Final answer
    x = 3,868.41

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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.