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Finding the Fourth Proportional to 908.33, 1,362.36 and 331.21

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Solution

The fourth proportional to 908.33, 1,362.36 and 331.21 is: 496.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.33 : 1,362.36 = 331.21 : x
  2. Step 2: Convert to fraction form
    908.33/1,362.36 = 331.21/x
  3. Step 3: Cross multiply
    908.33x = 1,362.36 × 331.21
  4. Step 4: Simplify right side
    908.33x = 451,220.44
  5. Step 5: Solve for x
    x = 451,220.44/908.33
  6. Step 6: Final answer
    x = 496.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.