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Finding the Fourth Proportional to 1,789.11, 2,679.71 and 1,375.20

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Solution

The fourth proportional to 1,789.11, 2,679.71 and 1,375.20 is: 2,059.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.11 : 2,679.71 = 1,375.20 : x
  2. Step 2: Convert to fraction form
    1,789.11/2,679.71 = 1,375.20/x
  3. Step 3: Cross multiply
    1,789.11x = 2,679.71 × 1,375.20
  4. Step 4: Simplify right side
    1,789.11x = 3,685,130.32
  5. Step 5: Solve for x
    x = 3,685,130.32/1,789.11
  6. Step 6: Final answer
    x = 2,059.76

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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.