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Finding the Fourth Proportional to 229.76, 316.96 and 203.76

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Solution

The fourth proportional to 229.76, 316.96 and 203.76 is: 281.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.76 : 316.96 = 203.76 : x
  2. Step 2: Convert to fraction form
    229.76/316.96 = 203.76/x
  3. Step 3: Cross multiply
    229.76x = 316.96 × 203.76
  4. Step 4: Simplify right side
    229.76x = 64,583.77
  5. Step 5: Solve for x
    x = 64,583.77/229.76
  6. Step 6: Final answer
    x = 281.09

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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.