Home / 2,381.13-3,571.09-921.31

Finding the Fourth Proportional to 2,381.13, 3,571.09 and 921.31

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Solution

The fourth proportional to 2,381.13, 3,571.09 and 921.31 is: 1,381.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.13 : 3,571.09 = 921.31 : x
  2. Step 2: Convert to fraction form
    2,381.13/3,571.09 = 921.31/x
  3. Step 3: Cross multiply
    2,381.13x = 3,571.09 × 921.31
  4. Step 4: Simplify right side
    2,381.13x = 3,290,069.70
  5. Step 5: Solve for x
    x = 3,290,069.70/2,381.13
  6. Step 6: Final answer
    x = 1,381.73

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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.