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Finding the Fourth Proportional to 3,145.69, 4,338.54 and 2,791.87

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Solution

The fourth proportional to 3,145.69, 4,338.54 and 2,791.87 is: 3,850.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.69 : 4,338.54 = 2,791.87 : x
  2. Step 2: Convert to fraction form
    3,145.69/4,338.54 = 2,791.87/x
  3. Step 3: Cross multiply
    3,145.69x = 4,338.54 × 2,791.87
  4. Step 4: Simplify right side
    3,145.69x = 12,112,639.67
  5. Step 5: Solve for x
    x = 12,112,639.67/3,145.69
  6. Step 6: Final answer
    x = 3,850.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.