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Finding the Fourth Proportional to 727.56, 1,091.22 and 207.48

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Solution

The fourth proportional to 727.56, 1,091.22 and 207.48 is: 311.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.56 : 1,091.22 = 207.48 : x
  2. Step 2: Convert to fraction form
    727.56/1,091.22 = 207.48/x
  3. Step 3: Cross multiply
    727.56x = 1,091.22 × 207.48
  4. Step 4: Simplify right side
    727.56x = 226,406.33
  5. Step 5: Solve for x
    x = 226,406.33/727.56
  6. Step 6: Final answer
    x = 311.19

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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.