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Finding the Fourth Proportional to 402.06, 554.80 and 227.40

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Solution

The fourth proportional to 402.06, 554.80 and 227.40 is: 313.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.06 : 554.80 = 227.40 : x
  2. Step 2: Convert to fraction form
    402.06/554.80 = 227.40/x
  3. Step 3: Cross multiply
    402.06x = 554.80 × 227.40
  4. Step 4: Simplify right side
    402.06x = 126,161.52
  5. Step 5: Solve for x
    x = 126,161.52/402.06
  6. Step 6: Final answer
    x = 313.79

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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.