Home / 3,719.28-5,578.11-1,121.61

Finding the Fourth Proportional to 3,719.28, 5,578.11 and 1,121.61

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Solution

The fourth proportional to 3,719.28, 5,578.11 and 1,121.61 is: 1,682.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,719.28 : 5,578.11 = 1,121.61 : x
  2. Step 2: Convert to fraction form
    3,719.28/5,578.11 = 1,121.61/x
  3. Step 3: Cross multiply
    3,719.28x = 5,578.11 × 1,121.61
  4. Step 4: Simplify right side
    3,719.28x = 6,256,463.96
  5. Step 5: Solve for x
    x = 6,256,463.96/3,719.28
  6. Step 6: Final answer
    x = 1,682.17

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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.