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Finding the Fourth Proportional to 1,789.11, 2,682.81 and 814.59

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Solution

The fourth proportional to 1,789.11, 2,682.81 and 814.59 is: 1,221.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.11 : 2,682.81 = 814.59 : x
  2. Step 2: Convert to fraction form
    1,789.11/2,682.81 = 814.59/x
  3. Step 3: Cross multiply
    1,789.11x = 2,682.81 × 814.59
  4. Step 4: Simplify right side
    1,789.11x = 2,185,390.20
  5. Step 5: Solve for x
    x = 2,185,390.20/1,789.11
  6. Step 6: Final answer
    x = 1,221.50

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1.5x scale

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.