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Finding the Fourth Proportional to 660.29, 990.49 and 227.45

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Solution

The fourth proportional to 660.29, 990.49 and 227.45 is: 341.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.29 : 990.49 = 227.45 : x
  2. Step 2: Convert to fraction form
    660.29/990.49 = 227.45/x
  3. Step 3: Cross multiply
    660.29x = 990.49 × 227.45
  4. Step 4: Simplify right side
    660.29x = 225,286.95
  5. Step 5: Solve for x
    x = 225,286.95/660.29
  6. Step 6: Final answer
    x = 341.19

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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.