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Finding the Fourth Proportional to 2,381.01, 3,571.44 and 920.49

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Solution

The fourth proportional to 2,381.01, 3,571.44 and 920.49 is: 1,380.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.01 : 3,571.44 = 920.49 : x
  2. Step 2: Convert to fraction form
    2,381.01/3,571.44 = 920.49/x
  3. Step 3: Cross multiply
    2,381.01x = 3,571.44 × 920.49
  4. Step 4: Simplify right side
    2,381.01x = 3,287,474.81
  5. Step 5: Solve for x
    x = 3,287,474.81/2,381.01
  6. Step 6: Final answer
    x = 1,380.71

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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.