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Finding the Fourth Proportional to 385.97, 579.20 and 223.97

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Solution

The fourth proportional to 385.97, 579.20 and 223.97 is: 336.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.97 : 579.20 = 223.97 : x
  2. Step 2: Convert to fraction form
    385.97/579.20 = 223.97/x
  3. Step 3: Cross multiply
    385.97x = 579.20 × 223.97
  4. Step 4: Simplify right side
    385.97x = 129,722.30
  5. Step 5: Solve for x
    x = 129,722.30/385.97
  6. Step 6: Final answer
    x = 336.09

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Why These Related Problems?

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