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Finding the Fourth Proportional to 639.33, 958.97 and 200.57

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Solution

The fourth proportional to 639.33, 958.97 and 200.57 is: 300.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.33 : 958.97 = 200.57 : x
  2. Step 2: Convert to fraction form
    639.33/958.97 = 200.57/x
  3. Step 3: Cross multiply
    639.33x = 958.97 × 200.57
  4. Step 4: Simplify right side
    639.33x = 192,342.50
  5. Step 5: Solve for x
    x = 192,342.50/639.33
  6. Step 6: Final answer
    x = 300.85

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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.