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Finding the Fourth Proportional to 626.05, 938.42 and 279.30

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Solution

The fourth proportional to 626.05, 938.42 and 279.30 is: 418.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.05 : 938.42 = 279.30 : x
  2. Step 2: Convert to fraction form
    626.05/938.42 = 279.30/x
  3. Step 3: Cross multiply
    626.05x = 938.42 × 279.30
  4. Step 4: Simplify right side
    626.05x = 262,100.71
  5. Step 5: Solve for x
    x = 262,100.71/626.05
  6. Step 6: Final answer
    x = 418.66

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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.