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Finding the Fourth Proportional to 1,276.62, 1,760.77 and 1,099.88

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Solution

The fourth proportional to 1,276.62, 1,760.77 and 1,099.88 is: 1,517.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.62 : 1,760.77 = 1,099.88 : x
  2. Step 2: Convert to fraction form
    1,276.62/1,760.77 = 1,099.88/x
  3. Step 3: Cross multiply
    1,276.62x = 1,760.77 × 1,099.88
  4. Step 4: Simplify right side
    1,276.62x = 1,936,630.21
  5. Step 5: Solve for x
    x = 1,936,630.21/1,276.62
  6. Step 6: Final answer
    x = 1,517.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.