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Finding the Fourth Proportional to 481.46, 721.94 and 192.90

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Solution

The fourth proportional to 481.46, 721.94 and 192.90 is: 289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.46 : 721.94 = 192.90 : x
  2. Step 2: Convert to fraction form
    481.46/721.94 = 192.90/x
  3. Step 3: Cross multiply
    481.46x = 721.94 × 192.90
  4. Step 4: Simplify right side
    481.46x = 139,262.23
  5. Step 5: Solve for x
    x = 139,262.23/481.46
  6. Step 6: Final answer
    x = 289.25

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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.