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Finding the Fourth Proportional to 300.71, 450.43 and 219.38

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Solution

The fourth proportional to 300.71, 450.43 and 219.38 is: 328.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.71 : 450.43 = 219.38 : x
  2. Step 2: Convert to fraction form
    300.71/450.43 = 219.38/x
  3. Step 3: Cross multiply
    300.71x = 450.43 × 219.38
  4. Step 4: Simplify right side
    300.71x = 98,812.53
  5. Step 5: Solve for x
    x = 98,812.53/300.71
  6. Step 6: Final answer
    x = 328.59

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.