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Finding the Fourth Proportional to 3,891.22, 5,837.69 and 1,117.68

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Solution

The fourth proportional to 3,891.22, 5,837.69 and 1,117.68 is: 1,676.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.22 : 5,837.69 = 1,117.68 : x
  2. Step 2: Convert to fraction form
    3,891.22/5,837.69 = 1,117.68/x
  3. Step 3: Cross multiply
    3,891.22x = 5,837.69 × 1,117.68
  4. Step 4: Simplify right side
    3,891.22x = 6,524,634.58
  5. Step 5: Solve for x
    x = 6,524,634.58/3,891.22
  6. Step 6: Final answer
    x = 1,676.76

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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.