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Finding the Fourth Proportional to 1,812.62, 2,716.88 and 1,080.66

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Solution

The fourth proportional to 1,812.62, 2,716.88 and 1,080.66 is: 1,619.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.62 : 2,716.88 = 1,080.66 : x
  2. Step 2: Convert to fraction form
    1,812.62/2,716.88 = 1,080.66/x
  3. Step 3: Cross multiply
    1,812.62x = 2,716.88 × 1,080.66
  4. Step 4: Simplify right side
    1,812.62x = 2,936,023.54
  5. Step 5: Solve for x
    x = 2,936,023.54/1,812.62
  6. Step 6: Final answer
    x = 1,619.77

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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.