Home / 1,943.06-2,911.82-1,121.54

Finding the Fourth Proportional to 1,943.06, 2,911.82 and 1,121.54

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Solution

The fourth proportional to 1,943.06, 2,911.82 and 1,121.54 is: 1,680.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,943.06 : 2,911.82 = 1,121.54 : x
  2. Step 2: Convert to fraction form
    1,943.06/2,911.82 = 1,121.54/x
  3. Step 3: Cross multiply
    1,943.06x = 2,911.82 × 1,121.54
  4. Step 4: Simplify right side
    1,943.06x = 3,265,722.60
  5. Step 5: Solve for x
    x = 3,265,722.60/1,943.06
  6. Step 6: Final answer
    x = 1,680.71

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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.