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Finding the Fourth Proportional to 638.82, 957.96 and 395.82

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Solution

The fourth proportional to 638.82, 957.96 and 395.82 is: 593.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.82 : 957.96 = 395.82 : x
  2. Step 2: Convert to fraction form
    638.82/957.96 = 395.82/x
  3. Step 3: Cross multiply
    638.82x = 957.96 × 395.82
  4. Step 4: Simplify right side
    638.82x = 379,179.73
  5. Step 5: Solve for x
    x = 379,179.73/638.82
  6. Step 6: Final answer
    x = 593.56

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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.