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Finding the Fourth Proportional to 568.31, 852.15 and 221.43

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Solution

The fourth proportional to 568.31, 852.15 and 221.43 is: 332.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.31 : 852.15 = 221.43 : x
  2. Step 2: Convert to fraction form
    568.31/852.15 = 221.43/x
  3. Step 3: Cross multiply
    568.31x = 852.15 × 221.43
  4. Step 4: Simplify right side
    568.31x = 188,691.57
  5. Step 5: Solve for x
    x = 188,691.57/568.31
  6. Step 6: Final answer
    x = 332.02

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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.