Home / 1,912.20-2,867.88-613.32

Finding the Fourth Proportional to 1,912.20, 2,867.88 and 613.32

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Solution

The fourth proportional to 1,912.20, 2,867.88 and 613.32 is: 919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.20 : 2,867.88 = 613.32 : x
  2. Step 2: Convert to fraction form
    1,912.20/2,867.88 = 613.32/x
  3. Step 3: Cross multiply
    1,912.20x = 2,867.88 × 613.32
  4. Step 4: Simplify right side
    1,912.20x = 1,758,928.16
  5. Step 5: Solve for x
    x = 1,758,928.16/1,912.20
  6. Step 6: Final answer
    x = 919.85

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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.