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Finding the Fourth Proportional to 462.21, 638.28 and 296.81

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Solution

The fourth proportional to 462.21, 638.28 and 296.81 is: 409.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.21 : 638.28 = 296.81 : x
  2. Step 2: Convert to fraction form
    462.21/638.28 = 296.81/x
  3. Step 3: Cross multiply
    462.21x = 638.28 × 296.81
  4. Step 4: Simplify right side
    462.21x = 189,450.68
  5. Step 5: Solve for x
    x = 189,450.68/462.21
  6. Step 6: Final answer
    x = 409.88

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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.