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Finding the Fourth Proportional to 628.76, 943.19 and 217.73

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Solution

The fourth proportional to 628.76, 943.19 and 217.73 is: 326.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.76 : 943.19 = 217.73 : x
  2. Step 2: Convert to fraction form
    628.76/943.19 = 217.73/x
  3. Step 3: Cross multiply
    628.76x = 943.19 × 217.73
  4. Step 4: Simplify right side
    628.76x = 205,354.95
  5. Step 5: Solve for x
    x = 205,354.95/628.76
  6. Step 6: Final answer
    x = 326.61

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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.