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Finding the Fourth Proportional to 485.27, 668.89 and 327.85

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Solution

The fourth proportional to 485.27, 668.89 and 327.85 is: 451.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.27 : 668.89 = 327.85 : x
  2. Step 2: Convert to fraction form
    485.27/668.89 = 327.85/x
  3. Step 3: Cross multiply
    485.27x = 668.89 × 327.85
  4. Step 4: Simplify right side
    485.27x = 219,298.70
  5. Step 5: Solve for x
    x = 219,298.70/485.27
  6. Step 6: Final answer
    x = 451.91

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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.