Home / 3,185.12-4,778.40-2,791.64

Finding the Fourth Proportional to 3,185.12, 4,778.40 and 2,791.64

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Solution

The fourth proportional to 3,185.12, 4,778.40 and 2,791.64 is: 4,188.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.12 : 4,778.40 = 2,791.64 : x
  2. Step 2: Convert to fraction form
    3,185.12/4,778.40 = 2,791.64/x
  3. Step 3: Cross multiply
    3,185.12x = 4,778.40 × 2,791.64
  4. Step 4: Simplify right side
    3,185.12x = 13,339,572.58
  5. Step 5: Solve for x
    x = 13,339,572.58/3,185.12
  6. Step 6: Final answer
    x = 4,188.09

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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.