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Finding the Fourth Proportional to 3,798.86, 5,691.26 and 3,186.50

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Solution

The fourth proportional to 3,798.86, 5,691.26 and 3,186.50 is: 4,773.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,798.86 : 5,691.26 = 3,186.50 : x
  2. Step 2: Convert to fraction form
    3,798.86/5,691.26 = 3,186.50/x
  3. Step 3: Cross multiply
    3,798.86x = 5,691.26 × 3,186.50
  4. Step 4: Simplify right side
    3,798.86x = 18,135,199.99
  5. Step 5: Solve for x
    x = 18,135,199.99/3,798.86
  6. Step 6: Final answer
    x = 4,773.85

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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.