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Finding the Fourth Proportional to 638.19, 957.47 and 227.43

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Solution

The fourth proportional to 638.19, 957.47 and 227.43 is: 341.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.19 : 957.47 = 227.43 : x
  2. Step 2: Convert to fraction form
    638.19/957.47 = 227.43/x
  3. Step 3: Cross multiply
    638.19x = 957.47 × 227.43
  4. Step 4: Simplify right side
    638.19x = 217,756.26
  5. Step 5: Solve for x
    x = 217,756.26/638.19
  6. Step 6: Final answer
    x = 341.21

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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.