Home / 2,178.38-3,268.38-1,138.34

Finding the Fourth Proportional to 2,178.38, 3,268.38 and 1,138.34

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Solution

The fourth proportional to 2,178.38, 3,268.38 and 1,138.34 is: 1,707.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.38 : 3,268.38 = 1,138.34 : x
  2. Step 2: Convert to fraction form
    2,178.38/3,268.38 = 1,138.34/x
  3. Step 3: Cross multiply
    2,178.38x = 3,268.38 × 1,138.34
  4. Step 4: Simplify right side
    2,178.38x = 3,720,511.35
  5. Step 5: Solve for x
    x = 3,720,511.35/2,178.38
  6. Step 6: Final answer
    x = 1,707.93

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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.