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Finding the Fourth Proportional to 402.07, 554.82 and 227.38

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Solution

The fourth proportional to 402.07, 554.82 and 227.38 is: 313.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.07 : 554.82 = 227.38 : x
  2. Step 2: Convert to fraction form
    402.07/554.82 = 227.38/x
  3. Step 3: Cross multiply
    402.07x = 554.82 × 227.38
  4. Step 4: Simplify right side
    402.07x = 126,153.58
  5. Step 5: Solve for x
    x = 126,153.58/402.07
  6. Step 6: Final answer
    x = 313.76

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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.