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Finding the Fourth Proportional to 628.22, 942.11 and 217.25

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Solution

The fourth proportional to 628.22, 942.11 and 217.25 is: 325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.22 : 942.11 = 217.25 : x
  2. Step 2: Convert to fraction form
    628.22/942.11 = 217.25/x
  3. Step 3: Cross multiply
    628.22x = 942.11 × 217.25
  4. Step 4: Simplify right side
    628.22x = 204,672.31
  5. Step 5: Solve for x
    x = 204,672.31/628.22
  6. Step 6: Final answer
    x = 325.80

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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.