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Finding the Fourth Proportional to 481.48, 721.62 and 192.64

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Solution

The fourth proportional to 481.48, 721.62 and 192.64 is: 288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.48 : 721.62 = 192.64 : x
  2. Step 2: Convert to fraction form
    481.48/721.62 = 192.64/x
  3. Step 3: Cross multiply
    481.48x = 721.62 × 192.64
  4. Step 4: Simplify right side
    481.48x = 139,012.88
  5. Step 5: Solve for x
    x = 139,012.88/481.48
  6. Step 6: Final answer
    x = 288.72

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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.