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Finding the Fourth Proportional to 300.76, 415.26 and 195.90

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Solution

The fourth proportional to 300.76, 415.26 and 195.90 is: 270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.76 : 415.26 = 195.90 : x
  2. Step 2: Convert to fraction form
    300.76/415.26 = 195.90/x
  3. Step 3: Cross multiply
    300.76x = 415.26 × 195.90
  4. Step 4: Simplify right side
    300.76x = 81,349.43
  5. Step 5: Solve for x
    x = 81,349.43/300.76
  6. Step 6: Final answer
    x = 270.48

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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.