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Finding the Fourth Proportional to 357.11, 533.07 and 331.79

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Solution

The fourth proportional to 357.11, 533.07 and 331.79 is: 495.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.11 : 533.07 = 331.79 : x
  2. Step 2: Convert to fraction form
    357.11/533.07 = 331.79/x
  3. Step 3: Cross multiply
    357.11x = 533.07 × 331.79
  4. Step 4: Simplify right side
    357.11x = 176,867.30
  5. Step 5: Solve for x
    x = 176,867.30/357.11
  6. Step 6: Final answer
    x = 495.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.