Home / 2,811.42-3,879.14-1,631.80

Finding the Fourth Proportional to 2,811.42, 3,879.14 and 1,631.80

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Solution

The fourth proportional to 2,811.42, 3,879.14 and 1,631.80 is: 2,251.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.42 : 3,879.14 = 1,631.80 : x
  2. Step 2: Convert to fraction form
    2,811.42/3,879.14 = 1,631.80/x
  3. Step 3: Cross multiply
    2,811.42x = 3,879.14 × 1,631.80
  4. Step 4: Simplify right side
    2,811.42x = 6,329,980.65
  5. Step 5: Solve for x
    x = 6,329,980.65/2,811.42
  6. Step 6: Final answer
    x = 2,251.52

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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.