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Finding the Fourth Proportional to 239.88, 361.56 and 228.18

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Solution

The fourth proportional to 239.88, 361.56 and 228.18 is: 343.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.88 : 361.56 = 228.18 : x
  2. Step 2: Convert to fraction form
    239.88/361.56 = 228.18/x
  3. Step 3: Cross multiply
    239.88x = 361.56 × 228.18
  4. Step 4: Simplify right side
    239.88x = 82,500.76
  5. Step 5: Solve for x
    x = 82,500.76/239.88
  6. Step 6: Final answer
    x = 343.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.