Home / 1,928.92-2,662.26-1,399.72

Finding the Fourth Proportional to 1,928.92, 2,662.26 and 1,399.72

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Solution

The fourth proportional to 1,928.92, 2,662.26 and 1,399.72 is: 1,931.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.92 : 2,662.26 = 1,399.72 : x
  2. Step 2: Convert to fraction form
    1,928.92/2,662.26 = 1,399.72/x
  3. Step 3: Cross multiply
    1,928.92x = 2,662.26 × 1,399.72
  4. Step 4: Simplify right side
    1,928.92x = 3,726,418.57
  5. Step 5: Solve for x
    x = 3,726,418.57/1,928.92
  6. Step 6: Final answer
    x = 1,931.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.