Home / 2,381.28-3,571.90-919.42

Finding the Fourth Proportional to 2,381.28, 3,571.90 and 919.42

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Solution

The fourth proportional to 2,381.28, 3,571.90 and 919.42 is: 1,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.28 : 3,571.90 = 919.42 : x
  2. Step 2: Convert to fraction form
    2,381.28/3,571.90 = 919.42/x
  3. Step 3: Cross multiply
    2,381.28x = 3,571.90 × 919.42
  4. Step 4: Simplify right side
    2,381.28x = 3,284,076.30
  5. Step 5: Solve for x
    x = 3,284,076.30/2,381.28
  6. Step 6: Final answer
    x = 1,379.12

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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.