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Finding the Fourth Proportional to 636.39, 949.41 and 628.20

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Solution

The fourth proportional to 636.39, 949.41 and 628.20 is: 937.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.39 : 949.41 = 628.20 : x
  2. Step 2: Convert to fraction form
    636.39/949.41 = 628.20/x
  3. Step 3: Cross multiply
    636.39x = 949.41 × 628.20
  4. Step 4: Simplify right side
    636.39x = 596,419.36
  5. Step 5: Solve for x
    x = 596,419.36/636.39
  6. Step 6: Final answer
    x = 937.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.