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Finding the Fourth Proportional to 305.74, 421.96 and 179.73

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Solution

The fourth proportional to 305.74, 421.96 and 179.73 is: 248.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.74 : 421.96 = 179.73 : x
  2. Step 2: Convert to fraction form
    305.74/421.96 = 179.73/x
  3. Step 3: Cross multiply
    305.74x = 421.96 × 179.73
  4. Step 4: Simplify right side
    305.74x = 75,837.97
  5. Step 5: Solve for x
    x = 75,837.97/305.74
  6. Step 6: Final answer
    x = 248.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.