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Finding the Fourth Proportional to 625.70, 937.90 and 279.20

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Solution

The fourth proportional to 625.70, 937.90 and 279.20 is: 418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 937.90 = 279.20 : x
  2. Step 2: Convert to fraction form
    625.70/937.90 = 279.20/x
  3. Step 3: Cross multiply
    625.70x = 937.90 × 279.20
  4. Step 4: Simplify right side
    625.70x = 261,860.86
  5. Step 5: Solve for x
    x = 261,860.86/625.70
  6. Step 6: Final answer
    x = 418.51

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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.