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Finding the Fourth Proportional to 300.68, 450.28 and 238.92

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Solution

The fourth proportional to 300.68, 450.28 and 238.92 is: 357.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.68 : 450.28 = 238.92 : x
  2. Step 2: Convert to fraction form
    300.68/450.28 = 238.92/x
  3. Step 3: Cross multiply
    300.68x = 450.28 × 238.92
  4. Step 4: Simplify right side
    300.68x = 107,580.90
  5. Step 5: Solve for x
    x = 107,580.90/300.68
  6. Step 6: Final answer
    x = 357.79

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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.