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Finding the Fourth Proportional to 727.93, 1,091.57 and 265.55

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Solution

The fourth proportional to 727.93, 1,091.57 and 265.55 is: 398.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.93 : 1,091.57 = 265.55 : x
  2. Step 2: Convert to fraction form
    727.93/1,091.57 = 265.55/x
  3. Step 3: Cross multiply
    727.93x = 1,091.57 × 265.55
  4. Step 4: Simplify right side
    727.93x = 289,866.41
  5. Step 5: Solve for x
    x = 289,866.41/727.93
  6. Step 6: Final answer
    x = 398.21

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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.