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Finding the Fourth Proportional to 1,091.33, 1,636.93 and 269.55

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Solution

The fourth proportional to 1,091.33, 1,636.93 and 269.55 is: 404.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.33 : 1,636.93 = 269.55 : x
  2. Step 2: Convert to fraction form
    1,091.33/1,636.93 = 269.55/x
  3. Step 3: Cross multiply
    1,091.33x = 1,636.93 × 269.55
  4. Step 4: Simplify right side
    1,091.33x = 441,234.48
  5. Step 5: Solve for x
    x = 441,234.48/1,091.33
  6. Step 6: Final answer
    x = 404.31

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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.