Home / 3,942.80-5,906.40-2,557.10

Finding the Fourth Proportional to 3,942.80, 5,906.40 and 2,557.10

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Solution

The fourth proportional to 3,942.80, 5,906.40 and 2,557.10 is: 3,830.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.80 : 5,906.40 = 2,557.10 : x
  2. Step 2: Convert to fraction form
    3,942.80/5,906.40 = 2,557.10/x
  3. Step 3: Cross multiply
    3,942.80x = 5,906.40 × 2,557.10
  4. Step 4: Simplify right side
    3,942.80x = 15,103,255.44
  5. Step 5: Solve for x
    x = 15,103,255.44/3,942.80
  6. Step 6: Final answer
    x = 3,830.59

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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.