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Finding the Fourth Proportional to 250.25, 375.41 and 85.71

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Solution

The fourth proportional to 250.25, 375.41 and 85.71 is: 128.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.25 : 375.41 = 85.71 : x
  2. Step 2: Convert to fraction form
    250.25/375.41 = 85.71/x
  3. Step 3: Cross multiply
    250.25x = 375.41 × 85.71
  4. Step 4: Simplify right side
    250.25x = 32,176.02
  5. Step 5: Solve for x
    x = 32,176.02/250.25
  6. Step 6: Final answer
    x = 128.58

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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.