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Finding the Fourth Proportional to 625.70, 938.22 and 351.72

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Solution

The fourth proportional to 625.70, 938.22 and 351.72 is: 527.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 938.22 = 351.72 : x
  2. Step 2: Convert to fraction form
    625.70/938.22 = 351.72/x
  3. Step 3: Cross multiply
    625.70x = 938.22 × 351.72
  4. Step 4: Simplify right side
    625.70x = 329,990.74
  5. Step 5: Solve for x
    x = 329,990.74/625.70
  6. Step 6: Final answer
    x = 527.39

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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.