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Finding the Fourth Proportional to 1,891.73, 2,837.40 and 1,279.37

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Solution

The fourth proportional to 1,891.73, 2,837.40 and 1,279.37 is: 1,918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.73 : 2,837.40 = 1,279.37 : x
  2. Step 2: Convert to fraction form
    1,891.73/2,837.40 = 1,279.37/x
  3. Step 3: Cross multiply
    1,891.73x = 2,837.40 × 1,279.37
  4. Step 4: Simplify right side
    1,891.73x = 3,630,084.44
  5. Step 5: Solve for x
    x = 3,630,084.44/1,891.73
  6. Step 6: Final answer
    x = 1,918.92

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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.