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Finding the Fourth Proportional to 300.68, 415.05 and 213.44

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Solution

The fourth proportional to 300.68, 415.05 and 213.44 is: 294.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.68 : 415.05 = 213.44 : x
  2. Step 2: Convert to fraction form
    300.68/415.05 = 213.44/x
  3. Step 3: Cross multiply
    300.68x = 415.05 × 213.44
  4. Step 4: Simplify right side
    300.68x = 88,588.27
  5. Step 5: Solve for x
    x = 88,588.27/300.68
  6. Step 6: Final answer
    x = 294.63

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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.