Home / 2,121.54-3,179.06-1,079.98

Finding the Fourth Proportional to 2,121.54, 3,179.06 and 1,079.98

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Solution

The fourth proportional to 2,121.54, 3,179.06 and 1,079.98 is: 1,618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.54 : 3,179.06 = 1,079.98 : x
  2. Step 2: Convert to fraction form
    2,121.54/3,179.06 = 1,079.98/x
  3. Step 3: Cross multiply
    2,121.54x = 3,179.06 × 1,079.98
  4. Step 4: Simplify right side
    2,121.54x = 3,433,311.85
  5. Step 5: Solve for x
    x = 3,433,311.85/2,121.54
  6. Step 6: Final answer
    x = 1,618.31

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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.