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Finding the Fourth Proportional to 721.39, 1,080.62 and 536.82

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Solution

The fourth proportional to 721.39, 1,080.62 and 536.82 is: 804.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.39 : 1,080.62 = 536.82 : x
  2. Step 2: Convert to fraction form
    721.39/1,080.62 = 536.82/x
  3. Step 3: Cross multiply
    721.39x = 1,080.62 × 536.82
  4. Step 4: Simplify right side
    721.39x = 580,098.43
  5. Step 5: Solve for x
    x = 580,098.43/721.39
  6. Step 6: Final answer
    x = 804.14

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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.