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Finding the Fourth Proportional to 300.92, 415.40 and 213.57

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Solution

The fourth proportional to 300.92, 415.40 and 213.57 is: 294.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.92 : 415.40 = 213.57 : x
  2. Step 2: Convert to fraction form
    300.92/415.40 = 213.57/x
  3. Step 3: Cross multiply
    300.92x = 415.40 × 213.57
  4. Step 4: Simplify right side
    300.92x = 88,715.91
  5. Step 5: Solve for x
    x = 88,715.91/300.92
  6. Step 6: Final answer
    x = 294.82

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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.