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Finding the Fourth Proportional to 463.22, 638.79 and 338.48

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Solution

The fourth proportional to 463.22, 638.79 and 338.48 is: 466.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.22 : 638.79 = 338.48 : x
  2. Step 2: Convert to fraction form
    463.22/638.79 = 338.48/x
  3. Step 3: Cross multiply
    463.22x = 638.79 × 338.48
  4. Step 4: Simplify right side
    463.22x = 216,215.57
  5. Step 5: Solve for x
    x = 216,215.57/463.22
  6. Step 6: Final answer
    x = 466.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.