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Finding the Fourth Proportional to 300.85, 415.41 and 230.80

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Solution

The fourth proportional to 300.85, 415.41 and 230.80 is: 318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.85 : 415.41 = 230.80 : x
  2. Step 2: Convert to fraction form
    300.85/415.41 = 230.80/x
  3. Step 3: Cross multiply
    300.85x = 415.41 × 230.80
  4. Step 4: Simplify right side
    300.85x = 95,875.01
  5. Step 5: Solve for x
    x = 95,875.01/300.85
  6. Step 6: Final answer
    x = 318.68

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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.