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Finding the Fourth Proportional to 481.69, 664.70 and 285.27

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Solution

The fourth proportional to 481.69, 664.70 and 285.27 is: 393.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.69 : 664.70 = 285.27 : x
  2. Step 2: Convert to fraction form
    481.69/664.70 = 285.27/x
  3. Step 3: Cross multiply
    481.69x = 664.70 × 285.27
  4. Step 4: Simplify right side
    481.69x = 189,618.97
  5. Step 5: Solve for x
    x = 189,618.97/481.69
  6. Step 6: Final answer
    x = 393.65

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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.