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Finding the Fourth Proportional to 625.34, 862.81 and 376.61

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Solution

The fourth proportional to 625.34, 862.81 and 376.61 is: 519.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.34 : 862.81 = 376.61 : x
  2. Step 2: Convert to fraction form
    625.34/862.81 = 376.61/x
  3. Step 3: Cross multiply
    625.34x = 862.81 × 376.61
  4. Step 4: Simplify right side
    625.34x = 324,942.87
  5. Step 5: Solve for x
    x = 324,942.87/625.34
  6. Step 6: Final answer
    x = 519.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.