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Finding the Fourth Proportional to 481.69, 664.82 and 285.19

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Solution

The fourth proportional to 481.69, 664.82 and 285.19 is: 393.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.69 : 664.82 = 285.19 : x
  2. Step 2: Convert to fraction form
    481.69/664.82 = 285.19/x
  3. Step 3: Cross multiply
    481.69x = 664.82 × 285.19
  4. Step 4: Simplify right side
    481.69x = 189,600.02
  5. Step 5: Solve for x
    x = 189,600.02/481.69
  6. Step 6: Final answer
    x = 393.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.