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Finding the Fourth Proportional to 1,817.11, 2,725.85 and 721.23

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Solution

The fourth proportional to 1,817.11, 2,725.85 and 721.23 is: 1,081.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.11 : 2,725.85 = 721.23 : x
  2. Step 2: Convert to fraction form
    1,817.11/2,725.85 = 721.23/x
  3. Step 3: Cross multiply
    1,817.11x = 2,725.85 × 721.23
  4. Step 4: Simplify right side
    1,817.11x = 1,965,964.80
  5. Step 5: Solve for x
    x = 1,965,964.80/1,817.11
  6. Step 6: Final answer
    x = 1,081.92

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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.