Home / 2,928.85-4,042.19-1,921.41

Finding the Fourth Proportional to 2,928.85, 4,042.19 and 1,921.41

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Solution

The fourth proportional to 2,928.85, 4,042.19 and 1,921.41 is: 2,651.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.85 : 4,042.19 = 1,921.41 : x
  2. Step 2: Convert to fraction form
    2,928.85/4,042.19 = 1,921.41/x
  3. Step 3: Cross multiply
    2,928.85x = 4,042.19 × 1,921.41
  4. Step 4: Simplify right side
    2,928.85x = 7,766,704.29
  5. Step 5: Solve for x
    x = 7,766,704.29/2,928.85
  6. Step 6: Final answer
    x = 2,651.79

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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.