Home / 3,942.28-5,915.71-2,188.75

Finding the Fourth Proportional to 3,942.28, 5,915.71 and 2,188.75

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Solution

The fourth proportional to 3,942.28, 5,915.71 and 2,188.75 is: 3,284.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.28 : 5,915.71 = 2,188.75 : x
  2. Step 2: Convert to fraction form
    3,942.28/5,915.71 = 2,188.75/x
  3. Step 3: Cross multiply
    3,942.28x = 5,915.71 × 2,188.75
  4. Step 4: Simplify right side
    3,942.28x = 12,947,980.68
  5. Step 5: Solve for x
    x = 12,947,980.68/3,942.28
  6. Step 6: Final answer
    x = 3,284.39

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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.