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Finding the Fourth Proportional to 625.74, 938.90 and 279.03

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Solution

The fourth proportional to 625.74, 938.90 and 279.03 is: 418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.74 : 938.90 = 279.03 : x
  2. Step 2: Convert to fraction form
    625.74/938.90 = 279.03/x
  3. Step 3: Cross multiply
    625.74x = 938.90 × 279.03
  4. Step 4: Simplify right side
    625.74x = 261,982.22
  5. Step 5: Solve for x
    x = 261,982.22/625.74
  6. Step 6: Final answer
    x = 418.68

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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.