Home / 3,281.40-4,912.43-2,168.78

Finding the Fourth Proportional to 3,281.40, 4,912.43 and 2,168.78

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Solution

The fourth proportional to 3,281.40, 4,912.43 and 2,168.78 is: 3,246.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,281.40 : 4,912.43 = 2,168.78 : x
  2. Step 2: Convert to fraction form
    3,281.40/4,912.43 = 2,168.78/x
  3. Step 3: Cross multiply
    3,281.40x = 4,912.43 × 2,168.78
  4. Step 4: Simplify right side
    3,281.40x = 10,653,944.53
  5. Step 5: Solve for x
    x = 10,653,944.53/3,281.40
  6. Step 6: Final answer
    x = 3,246.77

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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.