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Finding the Fourth Proportional to 625.44, 937.20 and 381.60

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Solution

The fourth proportional to 625.44, 937.20 and 381.60 is: 571.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.44 : 937.20 = 381.60 : x
  2. Step 2: Convert to fraction form
    625.44/937.20 = 381.60/x
  3. Step 3: Cross multiply
    625.44x = 937.20 × 381.60
  4. Step 4: Simplify right side
    625.44x = 357,635.52
  5. Step 5: Solve for x
    x = 357,635.52/625.44
  6. Step 6: Final answer
    x = 571.81

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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.