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Finding the Fourth Proportional to 481.29, 721.65 and 188.55

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Solution

The fourth proportional to 481.29, 721.65 and 188.55 is: 282.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.29 : 721.65 = 188.55 : x
  2. Step 2: Convert to fraction form
    481.29/721.65 = 188.55/x
  3. Step 3: Cross multiply
    481.29x = 721.65 × 188.55
  4. Step 4: Simplify right side
    481.29x = 136,067.11
  5. Step 5: Solve for x
    x = 136,067.11/481.29
  6. Step 6: Final answer
    x = 282.71

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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.