Home / 1,912.25-2,868.82-613.69

Finding the Fourth Proportional to 1,912.25, 2,868.82 and 613.69

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Solution

The fourth proportional to 1,912.25, 2,868.82 and 613.69 is: 920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.25 : 2,868.82 = 613.69 : x
  2. Step 2: Convert to fraction form
    1,912.25/2,868.82 = 613.69/x
  3. Step 3: Cross multiply
    1,912.25x = 2,868.82 × 613.69
  4. Step 4: Simplify right side
    1,912.25x = 1,760,557.44
  5. Step 5: Solve for x
    x = 1,760,557.44/1,912.25
  6. Step 6: Final answer
    x = 920.67

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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.