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Finding the Fourth Proportional to 355.80, 490.82 and 231.33

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Solution

The fourth proportional to 355.80, 490.82 and 231.33 is: 319.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.80 : 490.82 = 231.33 : x
  2. Step 2: Convert to fraction form
    355.80/490.82 = 231.33/x
  3. Step 3: Cross multiply
    355.80x = 490.82 × 231.33
  4. Step 4: Simplify right side
    355.80x = 113,540.23
  5. Step 5: Solve for x
    x = 113,540.23/355.80
  6. Step 6: Final answer
    x = 319.11

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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.