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Finding the Fourth Proportional to 3,857.78, 5,786.18 and 1,358.52

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Solution

The fourth proportional to 3,857.78, 5,786.18 and 1,358.52 is: 2,037.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.78 : 5,786.18 = 1,358.52 : x
  2. Step 2: Convert to fraction form
    3,857.78/5,786.18 = 1,358.52/x
  3. Step 3: Cross multiply
    3,857.78x = 5,786.18 × 1,358.52
  4. Step 4: Simplify right side
    3,857.78x = 7,860,658.05
  5. Step 5: Solve for x
    x = 7,860,658.05/3,857.78
  6. Step 6: Final answer
    x = 2,037.61

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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.