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Finding the Fourth Proportional to 300.28, 452.16 and 219.68

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Solution

The fourth proportional to 300.28, 452.16 and 219.68 is: 330.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.28 : 452.16 = 219.68 : x
  2. Step 2: Convert to fraction form
    300.28/452.16 = 219.68/x
  3. Step 3: Cross multiply
    300.28x = 452.16 × 219.68
  4. Step 4: Simplify right side
    300.28x = 99,330.51
  5. Step 5: Solve for x
    x = 99,330.51/300.28
  6. Step 6: Final answer
    x = 330.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.