Home / 1,972.62-2,959.97-1,279.11

Finding the Fourth Proportional to 1,972.62, 2,959.97 and 1,279.11

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Solution

The fourth proportional to 1,972.62, 2,959.97 and 1,279.11 is: 1,919.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.62 : 2,959.97 = 1,279.11 : x
  2. Step 2: Convert to fraction form
    1,972.62/2,959.97 = 1,279.11/x
  3. Step 3: Cross multiply
    1,972.62x = 2,959.97 × 1,279.11
  4. Step 4: Simplify right side
    1,972.62x = 3,786,120.83
  5. Step 5: Solve for x
    x = 3,786,120.83/1,972.62
  6. Step 6: Final answer
    x = 1,919.34

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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.