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Finding the Fourth Proportional to 257.09, 385.61 and 179.82

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Solution

The fourth proportional to 257.09, 385.61 and 179.82 is: 269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.09 : 385.61 = 179.82 : x
  2. Step 2: Convert to fraction form
    257.09/385.61 = 179.82/x
  3. Step 3: Cross multiply
    257.09x = 385.61 × 179.82
  4. Step 4: Simplify right side
    257.09x = 69,339.49
  5. Step 5: Solve for x
    x = 69,339.49/257.09
  6. Step 6: Final answer
    x = 269.71

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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.