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Finding the Fourth Proportional to 660.64, 991.06 and 227.68

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Solution

The fourth proportional to 660.64, 991.06 and 227.68 is: 341.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.64 : 991.06 = 227.68 : x
  2. Step 2: Convert to fraction form
    660.64/991.06 = 227.68/x
  3. Step 3: Cross multiply
    660.64x = 991.06 × 227.68
  4. Step 4: Simplify right side
    660.64x = 225,644.54
  5. Step 5: Solve for x
    x = 225,644.54/660.64
  6. Step 6: Final answer
    x = 341.55

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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.