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Finding the Fourth Proportional to 578.11, 868.83 and 481.21

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Solution

The fourth proportional to 578.11, 868.83 and 481.21 is: 723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.11 : 868.83 = 481.21 : x
  2. Step 2: Convert to fraction form
    578.11/868.83 = 481.21/x
  3. Step 3: Cross multiply
    578.11x = 868.83 × 481.21
  4. Step 4: Simplify right side
    578.11x = 418,089.68
  5. Step 5: Solve for x
    x = 418,089.68/578.11
  6. Step 6: Final answer
    x = 723.20

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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.