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Finding the Fourth Proportional to 627.71, 941.61 and 211.22

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Solution

The fourth proportional to 627.71, 941.61 and 211.22 is: 316.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.71 : 941.61 = 211.22 : x
  2. Step 2: Convert to fraction form
    627.71/941.61 = 211.22/x
  3. Step 3: Cross multiply
    627.71x = 941.61 × 211.22
  4. Step 4: Simplify right side
    627.71x = 198,886.86
  5. Step 5: Solve for x
    x = 198,886.86/627.71
  6. Step 6: Final answer
    x = 316.85

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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.