Home / 2,808.11-3,879.42-2,392.78

Finding the Fourth Proportional to 2,808.11, 3,879.42 and 2,392.78

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Solution

The fourth proportional to 2,808.11, 3,879.42 and 2,392.78 is: 3,305.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.11 : 3,879.42 = 2,392.78 : x
  2. Step 2: Convert to fraction form
    2,808.11/3,879.42 = 2,392.78/x
  3. Step 3: Cross multiply
    2,808.11x = 3,879.42 × 2,392.78
  4. Step 4: Simplify right side
    2,808.11x = 9,282,598.59
  5. Step 5: Solve for x
    x = 9,282,598.59/2,808.11
  6. Step 6: Final answer
    x = 3,305.64

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1.5x scale

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.