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Finding the Fourth Proportional to 402.03, 554.90 and 227.43

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Solution

The fourth proportional to 402.03, 554.90 and 227.43 is: 313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.03 : 554.90 = 227.43 : x
  2. Step 2: Convert to fraction form
    402.03/554.90 = 227.43/x
  3. Step 3: Cross multiply
    402.03x = 554.90 × 227.43
  4. Step 4: Simplify right side
    402.03x = 126,200.91
  5. Step 5: Solve for x
    x = 126,200.91/402.03
  6. Step 6: Final answer
    x = 313.91

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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.