Home / 2,381.33-3,572.24-821.13

Finding the Fourth Proportional to 2,381.33, 3,572.24 and 821.13

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Solution

The fourth proportional to 2,381.33, 3,572.24 and 821.13 is: 1,231.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.33 : 3,572.24 = 821.13 : x
  2. Step 2: Convert to fraction form
    2,381.33/3,572.24 = 821.13/x
  3. Step 3: Cross multiply
    2,381.33x = 3,572.24 × 821.13
  4. Step 4: Simplify right side
    2,381.33x = 2,933,269.33
  5. Step 5: Solve for x
    x = 2,933,269.33/2,381.33
  6. Step 6: Final answer
    x = 1,231.78

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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.