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Finding the Fourth Proportional to 227, 312.88 and 209.56

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Solution

The fourth proportional to 227, 312.88 and 209.56 is: 288.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    227 : 312.88 = 209.56 : x
  2. Step 2: Convert to fraction form
    227/312.88 = 209.56/x
  3. Step 3: Cross multiply
    227x = 312.88 × 209.56
  4. Step 4: Simplify right side
    227x = 65,567.13
  5. Step 5: Solve for x
    x = 65,567.13/227
  6. Step 6: Final answer
    x = 288.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.