Home / 3,121.32-4,680.38-1,271.38

Finding the Fourth Proportional to 3,121.32, 4,680.38 and 1,271.38

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Solution

The fourth proportional to 3,121.32, 4,680.38 and 1,271.38 is: 1,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.32 : 4,680.38 = 1,271.38 : x
  2. Step 2: Convert to fraction form
    3,121.32/4,680.38 = 1,271.38/x
  3. Step 3: Cross multiply
    3,121.32x = 4,680.38 × 1,271.38
  4. Step 4: Simplify right side
    3,121.32x = 5,950,541.52
  5. Step 5: Solve for x
    x = 5,950,541.52/3,121.32
  6. Step 6: Final answer
    x = 1,906.42

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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.