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Finding the Fourth Proportional to 660.43, 991.05 and 227.89

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Solution

The fourth proportional to 660.43, 991.05 and 227.89 is: 341.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.43 : 991.05 = 227.89 : x
  2. Step 2: Convert to fraction form
    660.43/991.05 = 227.89/x
  3. Step 3: Cross multiply
    660.43x = 991.05 × 227.89
  4. Step 4: Simplify right side
    660.43x = 225,850.38
  5. Step 5: Solve for x
    x = 225,850.38/660.43
  6. Step 6: Final answer
    x = 341.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.