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Finding the Fourth Proportional to 3,789.64, 5,684.64 and 1,192.78

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Solution

The fourth proportional to 3,789.64, 5,684.64 and 1,192.78 is: 1,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789.64 : 5,684.64 = 1,192.78 : x
  2. Step 2: Convert to fraction form
    3,789.64/5,684.64 = 1,192.78/x
  3. Step 3: Cross multiply
    3,789.64x = 5,684.64 × 1,192.78
  4. Step 4: Simplify right side
    3,789.64x = 6,780,524.90
  5. Step 5: Solve for x
    x = 6,780,524.90/3,789.64
  6. Step 6: Final answer
    x = 1,789.23

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1.5x scale

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.