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Finding the Fourth Proportional to 481.48, 722.96 and 389.22

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Solution

The fourth proportional to 481.48, 722.96 and 389.22 is: 584.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.48 : 722.96 = 389.22 : x
  2. Step 2: Convert to fraction form
    481.48/722.96 = 389.22/x
  3. Step 3: Cross multiply
    481.48x = 722.96 × 389.22
  4. Step 4: Simplify right side
    481.48x = 281,389.95
  5. Step 5: Solve for x
    x = 281,389.95/481.48
  6. Step 6: Final answer
    x = 584.42

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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.