Home / 2,616.94-3,918.39-1,381.78

Finding the Fourth Proportional to 2,616.94, 3,918.39 and 1,381.78

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Solution

The fourth proportional to 2,616.94, 3,918.39 and 1,381.78 is: 2,068.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,616.94 : 3,918.39 = 1,381.78 : x
  2. Step 2: Convert to fraction form
    2,616.94/3,918.39 = 1,381.78/x
  3. Step 3: Cross multiply
    2,616.94x = 3,918.39 × 1,381.78
  4. Step 4: Simplify right side
    2,616.94x = 5,414,352.93
  5. Step 5: Solve for x
    x = 5,414,352.93/2,616.94
  6. Step 6: Final answer
    x = 2,068.96

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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.