Home / 2,811.48-3,879.19-1,631.85

Finding the Fourth Proportional to 2,811.48, 3,879.19 and 1,631.85

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Solution

The fourth proportional to 2,811.48, 3,879.19 and 1,631.85 is: 2,251.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.48 : 3,879.19 = 1,631.85 : x
  2. Step 2: Convert to fraction form
    2,811.48/3,879.19 = 1,631.85/x
  3. Step 3: Cross multiply
    2,811.48x = 3,879.19 × 1,631.85
  4. Step 4: Simplify right side
    2,811.48x = 6,330,256.20
  5. Step 5: Solve for x
    x = 6,330,256.20/2,811.48
  6. Step 6: Final answer
    x = 2,251.57

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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.