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Finding the Fourth Proportional to 251.28, 377.36 and 217.59

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Solution

The fourth proportional to 251.28, 377.36 and 217.59 is: 326.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.28 : 377.36 = 217.59 : x
  2. Step 2: Convert to fraction form
    251.28/377.36 = 217.59/x
  3. Step 3: Cross multiply
    251.28x = 377.36 × 217.59
  4. Step 4: Simplify right side
    251.28x = 82,109.76
  5. Step 5: Solve for x
    x = 82,109.76/251.28
  6. Step 6: Final answer
    x = 326.77

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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.