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Finding the Fourth Proportional to 644.97, 965.88 and 628.53

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Solution

The fourth proportional to 644.97, 965.88 and 628.53 is: 941.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.97 : 965.88 = 628.53 : x
  2. Step 2: Convert to fraction form
    644.97/965.88 = 628.53/x
  3. Step 3: Cross multiply
    644.97x = 965.88 × 628.53
  4. Step 4: Simplify right side
    644.97x = 607,084.56
  5. Step 5: Solve for x
    x = 607,084.56/644.97
  6. Step 6: Final answer
    x = 941.26

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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.