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Finding the Fourth Proportional to 271.06, 408.21 and 228

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Solution

The fourth proportional to 271.06, 408.21 and 228 is: 343.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.06 : 408.21 = 228 : x
  2. Step 2: Convert to fraction form
    271.06/408.21 = 228/x
  3. Step 3: Cross multiply
    271.06x = 408.21 × 228
  4. Step 4: Simplify right side
    271.06x = 93,071.88
  5. Step 5: Solve for x
    x = 93,071.88/271.06
  6. Step 6: Final answer
    x = 343.37

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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.