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Finding the Fourth Proportional to 638.17, 956.74 and 227.59

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Solution

The fourth proportional to 638.17, 956.74 and 227.59 is: 341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.17 : 956.74 = 227.59 : x
  2. Step 2: Convert to fraction form
    638.17/956.74 = 227.59/x
  3. Step 3: Cross multiply
    638.17x = 956.74 × 227.59
  4. Step 4: Simplify right side
    638.17x = 217,744.46
  5. Step 5: Solve for x
    x = 217,744.46/638.17
  6. Step 6: Final answer
    x = 341.20

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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.