Home / 3,942.42-5,442.73-2,879.12

Finding the Fourth Proportional to 3,942.42, 5,442.73 and 2,879.12

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Solution

The fourth proportional to 3,942.42, 5,442.73 and 2,879.12 is: 3,974.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.42 : 5,442.73 = 2,879.12 : x
  2. Step 2: Convert to fraction form
    3,942.42/5,442.73 = 2,879.12/x
  3. Step 3: Cross multiply
    3,942.42x = 5,442.73 × 2,879.12
  4. Step 4: Simplify right side
    3,942.42x = 15,670,279.21
  5. Step 5: Solve for x
    x = 15,670,279.21/3,942.42
  6. Step 6: Final answer
    x = 3,974.79

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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.