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Finding the Fourth Proportional to 627.25, 940.25 and 216.11

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Solution

The fourth proportional to 627.25, 940.25 and 216.11 is: 323.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.25 : 940.25 = 216.11 : x
  2. Step 2: Convert to fraction form
    627.25/940.25 = 216.11/x
  3. Step 3: Cross multiply
    627.25x = 940.25 × 216.11
  4. Step 4: Simplify right side
    627.25x = 203,192.73
  5. Step 5: Solve for x
    x = 203,192.73/627.25
  6. Step 6: Final answer
    x = 323.94

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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.