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Finding the Fourth Proportional to 727.42, 1,091.10 and 179.59

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Solution

The fourth proportional to 727.42, 1,091.10 and 179.59 is: 269.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.42 : 1,091.10 = 179.59 : x
  2. Step 2: Convert to fraction form
    727.42/1,091.10 = 179.59/x
  3. Step 3: Cross multiply
    727.42x = 1,091.10 × 179.59
  4. Step 4: Simplify right side
    727.42x = 195,951.83
  5. Step 5: Solve for x
    x = 195,951.83/727.42
  6. Step 6: Final answer
    x = 269.38

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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.