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Finding the Fourth Proportional to 2,855.52, 3,940.44 and 2,771.64

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Solution

The fourth proportional to 2,855.52, 3,940.44 and 2,771.64 is: 3,824.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.52 : 3,940.44 = 2,771.64 : x
  2. Step 2: Convert to fraction form
    2,855.52/3,940.44 = 2,771.64/x
  3. Step 3: Cross multiply
    2,855.52x = 3,940.44 × 2,771.64
  4. Step 4: Simplify right side
    2,855.52x = 10,921,481.12
  5. Step 5: Solve for x
    x = 10,921,481.12/2,855.52
  6. Step 6: Final answer
    x = 3,824.69

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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.