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Finding the Fourth Proportional to 854.97, 1,179.86 and 481.91

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Solution

The fourth proportional to 854.97, 1,179.86 and 481.91 is: 665.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.97 : 1,179.86 = 481.91 : x
  2. Step 2: Convert to fraction form
    854.97/1,179.86 = 481.91/x
  3. Step 3: Cross multiply
    854.97x = 1,179.86 × 481.91
  4. Step 4: Simplify right side
    854.97x = 568,586.33
  5. Step 5: Solve for x
    x = 568,586.33/854.97
  6. Step 6: Final answer
    x = 665.04

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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.