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Finding the Fourth Proportional to 625.88, 938.84 and 209.42

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Solution

The fourth proportional to 625.88, 938.84 and 209.42 is: 314.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.88 : 938.84 = 209.42 : x
  2. Step 2: Convert to fraction form
    625.88/938.84 = 209.42/x
  3. Step 3: Cross multiply
    625.88x = 938.84 × 209.42
  4. Step 4: Simplify right side
    625.88x = 196,611.87
  5. Step 5: Solve for x
    x = 196,611.87/625.88
  6. Step 6: Final answer
    x = 314.14

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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.