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Finding the Fourth Proportional to 727.70, 1,091.17 and 265.37

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Solution

The fourth proportional to 727.70, 1,091.17 and 265.37 is: 397.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.70 : 1,091.17 = 265.37 : x
  2. Step 2: Convert to fraction form
    727.70/1,091.17 = 265.37/x
  3. Step 3: Cross multiply
    727.70x = 1,091.17 × 265.37
  4. Step 4: Simplify right side
    727.70x = 289,558.66
  5. Step 5: Solve for x
    x = 289,558.66/727.70
  6. Step 6: Final answer
    x = 397.91

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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.