Home / 2,811.60-3,879.36-1,631.97

Finding the Fourth Proportional to 2,811.60, 3,879.36 and 1,631.97

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Solution

The fourth proportional to 2,811.60, 3,879.36 and 1,631.97 is: 2,251.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.60 : 3,879.36 = 1,631.97 : x
  2. Step 2: Convert to fraction form
    2,811.60/3,879.36 = 1,631.97/x
  3. Step 3: Cross multiply
    2,811.60x = 3,879.36 × 1,631.97
  4. Step 4: Simplify right side
    2,811.60x = 6,330,999.14
  5. Step 5: Solve for x
    x = 6,330,999.14/2,811.60
  6. Step 6: Final answer
    x = 2,251.74

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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.