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Finding the Fourth Proportional to 331.38, 497.34 and 239.22

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Solution

The fourth proportional to 331.38, 497.34 and 239.22 is: 359.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.38 : 497.34 = 239.22 : x
  2. Step 2: Convert to fraction form
    331.38/497.34 = 239.22/x
  3. Step 3: Cross multiply
    331.38x = 497.34 × 239.22
  4. Step 4: Simplify right side
    331.38x = 118,973.67
  5. Step 5: Solve for x
    x = 118,973.67/331.38
  6. Step 6: Final answer
    x = 359.02

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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.