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Finding the Fourth Proportional to 1,808.73, 2,712.49 and 1,261.17

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Solution

The fourth proportional to 1,808.73, 2,712.49 and 1,261.17 is: 1,891.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.73 : 2,712.49 = 1,261.17 : x
  2. Step 2: Convert to fraction form
    1,808.73/2,712.49 = 1,261.17/x
  3. Step 3: Cross multiply
    1,808.73x = 2,712.49 × 1,261.17
  4. Step 4: Simplify right side
    1,808.73x = 3,420,907.86
  5. Step 5: Solve for x
    x = 3,420,907.86/1,808.73
  6. Step 6: Final answer
    x = 1,891.33

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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.