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Finding the Fourth Proportional to 660.38, 990.68 and 227.44

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Solution

The fourth proportional to 660.38, 990.68 and 227.44 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.38 : 990.68 = 227.44 : x
  2. Step 2: Convert to fraction form
    660.38/990.68 = 227.44/x
  3. Step 3: Cross multiply
    660.38x = 990.68 × 227.44
  4. Step 4: Simplify right side
    660.38x = 225,320.26
  5. Step 5: Solve for x
    x = 225,320.26/660.38
  6. Step 6: Final answer
    x = 341.20

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1.5x scale

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.