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Finding the Fourth Proportional to 727.61, 1,091.59 and 240.71

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Solution

The fourth proportional to 727.61, 1,091.59 and 240.71 is: 361.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.61 : 1,091.59 = 240.71 : x
  2. Step 2: Convert to fraction form
    727.61/1,091.59 = 240.71/x
  3. Step 3: Cross multiply
    727.61x = 1,091.59 × 240.71
  4. Step 4: Simplify right side
    727.61x = 262,756.02
  5. Step 5: Solve for x
    x = 262,756.02/727.61
  6. Step 6: Final answer
    x = 361.12

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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.