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Finding the Fourth Proportional to 721.13, 1,080.92 and 350.16

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Solution

The fourth proportional to 721.13, 1,080.92 and 350.16 is: 524.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.13 : 1,080.92 = 350.16 : x
  2. Step 2: Convert to fraction form
    721.13/1,080.92 = 350.16/x
  3. Step 3: Cross multiply
    721.13x = 1,080.92 × 350.16
  4. Step 4: Simplify right side
    721.13x = 378,488.67
  5. Step 5: Solve for x
    x = 378,488.67/721.13
  6. Step 6: Final answer
    x = 524.85

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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.