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Finding the Fourth Proportional to 251.89, 375.61 and 217.87

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Solution

The fourth proportional to 251.89, 375.61 and 217.87 is: 324.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.89 : 375.61 = 217.87 : x
  2. Step 2: Convert to fraction form
    251.89/375.61 = 217.87/x
  3. Step 3: Cross multiply
    251.89x = 375.61 × 217.87
  4. Step 4: Simplify right side
    251.89x = 81,834.15
  5. Step 5: Solve for x
    x = 81,834.15/251.89
  6. Step 6: Final answer
    x = 324.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.