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Finding the Fourth Proportional to 626.75, 939.07 and 443.25

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Solution

The fourth proportional to 626.75, 939.07 and 443.25 is: 664.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.75 : 939.07 = 443.25 : x
  2. Step 2: Convert to fraction form
    626.75/939.07 = 443.25/x
  3. Step 3: Cross multiply
    626.75x = 939.07 × 443.25
  4. Step 4: Simplify right side
    626.75x = 416,241.67
  5. Step 5: Solve for x
    x = 416,241.67/626.75
  6. Step 6: Final answer
    x = 664.12

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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.