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Finding the Fourth Proportional to 495.21, 742.98 and 331.33

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Solution

The fourth proportional to 495.21, 742.98 and 331.33 is: 497.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.21 : 742.98 = 331.33 : x
  2. Step 2: Convert to fraction form
    495.21/742.98 = 331.33/x
  3. Step 3: Cross multiply
    495.21x = 742.98 × 331.33
  4. Step 4: Simplify right side
    495.21x = 246,171.56
  5. Step 5: Solve for x
    x = 246,171.56/495.21
  6. Step 6: Final answer
    x = 497.11

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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.