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Finding the Fourth Proportional to 1,817.09, 2,726.08 and 721.09

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Solution

The fourth proportional to 1,817.09, 2,726.08 and 721.09 is: 1,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.09 : 2,726.08 = 721.09 : x
  2. Step 2: Convert to fraction form
    1,817.09/2,726.08 = 721.09/x
  3. Step 3: Cross multiply
    1,817.09x = 2,726.08 × 721.09
  4. Step 4: Simplify right side
    1,817.09x = 1,965,744.47
  5. Step 5: Solve for x
    x = 1,965,744.47/1,817.09
  6. Step 6: Final answer
    x = 1,081.81

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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.