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Finding the Fourth Proportional to 257.93, 385.86 and 166.71

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Solution

The fourth proportional to 257.93, 385.86 and 166.71 is: 249.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.93 : 385.86 = 166.71 : x
  2. Step 2: Convert to fraction form
    257.93/385.86 = 166.71/x
  3. Step 3: Cross multiply
    257.93x = 385.86 × 166.71
  4. Step 4: Simplify right side
    257.93x = 64,326.62
  5. Step 5: Solve for x
    x = 64,326.62/257.93
  6. Step 6: Final answer
    x = 249.39

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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.