Home / 3,872.41-5,343.61-2,278.81

Finding the Fourth Proportional to 3,872.41, 5,343.61 and 2,278.81

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Solution

The fourth proportional to 3,872.41, 5,343.61 and 2,278.81 is: 3,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.41 : 5,343.61 = 2,278.81 : x
  2. Step 2: Convert to fraction form
    3,872.41/5,343.61 = 2,278.81/x
  3. Step 3: Cross multiply
    3,872.41x = 5,343.61 × 2,278.81
  4. Step 4: Simplify right side
    3,872.41x = 12,177,071.90
  5. Step 5: Solve for x
    x = 12,177,071.90/3,872.41
  6. Step 6: Final answer
    x = 3,144.57

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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.