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Finding the Fourth Proportional to 485, 727.82 and 181

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Solution

The fourth proportional to 485, 727.82 and 181 is: 271.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    485 : 727.82 = 181 : x
  2. Step 2: Convert to fraction form
    485/727.82 = 181/x
  3. Step 3: Cross multiply
    485x = 727.82 × 181
  4. Step 4: Simplify right side
    485x = 131,735.42
  5. Step 5: Solve for x
    x = 131,735.42/485
  6. Step 6: Final answer
    x = 271.62

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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.