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Finding the Fourth Proportional to 727.35, 1,091.34 and 398.04

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Solution

The fourth proportional to 727.35, 1,091.34 and 398.04 is: 597.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.35 : 1,091.34 = 398.04 : x
  2. Step 2: Convert to fraction form
    727.35/1,091.34 = 398.04/x
  3. Step 3: Cross multiply
    727.35x = 1,091.34 × 398.04
  4. Step 4: Simplify right side
    727.35x = 434,396.97
  5. Step 5: Solve for x
    x = 434,396.97/727.35
  6. Step 6: Final answer
    x = 597.23

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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.