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Finding the Fourth Proportional to 3,789.64, 5,229.72 and 2,133.64

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Solution

The fourth proportional to 3,789.64, 5,229.72 and 2,133.64 is: 2,944.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789.64 : 5,229.72 = 2,133.64 : x
  2. Step 2: Convert to fraction form
    3,789.64/5,229.72 = 2,133.64/x
  3. Step 3: Cross multiply
    3,789.64x = 5,229.72 × 2,133.64
  4. Step 4: Simplify right side
    3,789.64x = 11,158,339.78
  5. Step 5: Solve for x
    x = 11,158,339.78/3,789.64
  6. Step 6: Final answer
    x = 2,944.43

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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.