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Finding the Fourth Proportional to 727.82, 1,091.45 and 240.75

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Solution

The fourth proportional to 727.82, 1,091.45 and 240.75 is: 361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.82 : 1,091.45 = 240.75 : x
  2. Step 2: Convert to fraction form
    727.82/1,091.45 = 240.75/x
  3. Step 3: Cross multiply
    727.82x = 1,091.45 × 240.75
  4. Step 4: Simplify right side
    727.82x = 262,765.38
  5. Step 5: Solve for x
    x = 262,765.38/727.82
  6. Step 6: Final answer
    x = 361.03

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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.