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Finding the Fourth Proportional to 239.02, 331.53 and 229.30

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Solution

The fourth proportional to 239.02, 331.53 and 229.30 is: 318.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.02 : 331.53 = 229.30 : x
  2. Step 2: Convert to fraction form
    239.02/331.53 = 229.30/x
  3. Step 3: Cross multiply
    239.02x = 331.53 × 229.30
  4. Step 4: Simplify right side
    239.02x = 76,018.68
  5. Step 5: Solve for x
    x = 76,018.68/239.02
  6. Step 6: Final answer
    x = 318.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.