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Finding the Fourth Proportional to 855.03, 1,179.86 and 481.98

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Solution

The fourth proportional to 855.03, 1,179.86 and 481.98 is: 665.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.03 : 1,179.86 = 481.98 : x
  2. Step 2: Convert to fraction form
    855.03/1,179.86 = 481.98/x
  3. Step 3: Cross multiply
    855.03x = 1,179.86 × 481.98
  4. Step 4: Simplify right side
    855.03x = 568,668.92
  5. Step 5: Solve for x
    x = 568,668.92/855.03
  6. Step 6: Final answer
    x = 665.09

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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.