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Finding the Fourth Proportional to 382.35, 573.45 and 125.85

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Solution

The fourth proportional to 382.35, 573.45 and 125.85 is: 188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.35 : 573.45 = 125.85 : x
  2. Step 2: Convert to fraction form
    382.35/573.45 = 125.85/x
  3. Step 3: Cross multiply
    382.35x = 573.45 × 125.85
  4. Step 4: Simplify right side
    382.35x = 72,168.68
  5. Step 5: Solve for x
    x = 72,168.68/382.35
  6. Step 6: Final answer
    x = 188.75

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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.