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Finding the Fourth Proportional to 395.46, 545.69 and 227.43

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Solution

The fourth proportional to 395.46, 545.69 and 227.43 is: 313.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.46 : 545.69 = 227.43 : x
  2. Step 2: Convert to fraction form
    395.46/545.69 = 227.43/x
  3. Step 3: Cross multiply
    395.46x = 545.69 × 227.43
  4. Step 4: Simplify right side
    395.46x = 124,105.14
  5. Step 5: Solve for x
    x = 124,105.14/395.46
  6. Step 6: Final answer
    x = 313.82

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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.