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Finding the Fourth Proportional to 250.38, 375.44 and 85.80

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Solution

The fourth proportional to 250.38, 375.44 and 85.80 is: 128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.38 : 375.44 = 85.80 : x
  2. Step 2: Convert to fraction form
    250.38/375.44 = 85.80/x
  3. Step 3: Cross multiply
    250.38x = 375.44 × 85.80
  4. Step 4: Simplify right side
    250.38x = 32,211.62
  5. Step 5: Solve for x
    x = 32,211.62/250.38
  6. Step 6: Final answer
    x = 128.65

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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.