Home / 3,511.78-5,268.18-1,320.82

Finding the Fourth Proportional to 3,511.78, 5,268.18 and 1,320.82

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Solution

The fourth proportional to 3,511.78, 5,268.18 and 1,320.82 is: 1,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,511.78 : 5,268.18 = 1,320.82 : x
  2. Step 2: Convert to fraction form
    3,511.78/5,268.18 = 1,320.82/x
  3. Step 3: Cross multiply
    3,511.78x = 5,268.18 × 1,320.82
  4. Step 4: Simplify right side
    3,511.78x = 6,958,317.51
  5. Step 5: Solve for x
    x = 6,958,317.51/3,511.78
  6. Step 6: Final answer
    x = 1,981.42

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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.