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Finding the Fourth Proportional to 638.87, 957.99 and 227.95

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Solution

The fourth proportional to 638.87, 957.99 and 227.95 is: 341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.87 : 957.99 = 227.95 : x
  2. Step 2: Convert to fraction form
    638.87/957.99 = 227.95/x
  3. Step 3: Cross multiply
    638.87x = 957.99 × 227.95
  4. Step 4: Simplify right side
    638.87x = 218,373.82
  5. Step 5: Solve for x
    x = 218,373.82/638.87
  6. Step 6: Final answer
    x = 341.81

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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.