Home / 1,912.32-2,868.42-613.80

Finding the Fourth Proportional to 1,912.32, 2,868.42 and 613.80

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Solution

The fourth proportional to 1,912.32, 2,868.42 and 613.80 is: 920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.32 : 2,868.42 = 613.80 : x
  2. Step 2: Convert to fraction form
    1,912.32/2,868.42 = 613.80/x
  3. Step 3: Cross multiply
    1,912.32x = 2,868.42 × 613.80
  4. Step 4: Simplify right side
    1,912.32x = 1,760,636.20
  5. Step 5: Solve for x
    x = 1,760,636.20/1,912.32
  6. Step 6: Final answer
    x = 920.68

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1.5x scale

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.