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Finding the Fourth Proportional to 638.44, 958.07 and 330.33

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Solution

The fourth proportional to 638.44, 958.07 and 330.33 is: 495.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.44 : 958.07 = 330.33 : x
  2. Step 2: Convert to fraction form
    638.44/958.07 = 330.33/x
  3. Step 3: Cross multiply
    638.44x = 958.07 × 330.33
  4. Step 4: Simplify right side
    638.44x = 316,475.97
  5. Step 5: Solve for x
    x = 316,475.97/638.44
  6. Step 6: Final answer
    x = 495.70

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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.