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Finding the Fourth Proportional to 1,809.97, 2,712.11 and 1,079.15

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Solution

The fourth proportional to 1,809.97, 2,712.11 and 1,079.15 is: 1,617.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.97 : 2,712.11 = 1,079.15 : x
  2. Step 2: Convert to fraction form
    1,809.97/2,712.11 = 1,079.15/x
  3. Step 3: Cross multiply
    1,809.97x = 2,712.11 × 1,079.15
  4. Step 4: Simplify right side
    1,809.97x = 2,926,754.55
  5. Step 5: Solve for x
    x = 2,926,754.55/1,809.97
  6. Step 6: Final answer
    x = 1,617.02

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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.