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Finding the Fourth Proportional to 3,859.14, 5,789.52 and 1,261.88

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Solution

The fourth proportional to 3,859.14, 5,789.52 and 1,261.88 is: 1,893.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.14 : 5,789.52 = 1,261.88 : x
  2. Step 2: Convert to fraction form
    3,859.14/5,789.52 = 1,261.88/x
  3. Step 3: Cross multiply
    3,859.14x = 5,789.52 × 1,261.88
  4. Step 4: Simplify right side
    3,859.14x = 7,305,650.55
  5. Step 5: Solve for x
    x = 7,305,650.55/3,859.14
  6. Step 6: Final answer
    x = 1,893.08

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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.