Home / 1,945.92-2,913.98-1,121.75

Finding the Fourth Proportional to 1,945.92, 2,913.98 and 1,121.75

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Solution

The fourth proportional to 1,945.92, 2,913.98 and 1,121.75 is: 1,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.92 : 2,913.98 = 1,121.75 : x
  2. Step 2: Convert to fraction form
    1,945.92/2,913.98 = 1,121.75/x
  3. Step 3: Cross multiply
    1,945.92x = 2,913.98 × 1,121.75
  4. Step 4: Simplify right side
    1,945.92x = 3,268,747.81
  5. Step 5: Solve for x
    x = 3,268,747.81/1,945.92
  6. Step 6: Final answer
    x = 1,679.79

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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.