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Finding the Fourth Proportional to 626.22, 939.38 and 279.39

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Solution

The fourth proportional to 626.22, 939.38 and 279.39 is: 419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.22 : 939.38 = 279.39 : x
  2. Step 2: Convert to fraction form
    626.22/939.38 = 279.39/x
  3. Step 3: Cross multiply
    626.22x = 939.38 × 279.39
  4. Step 4: Simplify right side
    626.22x = 262,451.98
  5. Step 5: Solve for x
    x = 262,451.98/626.22
  6. Step 6: Final answer
    x = 419.11

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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.