Home / 1,921.20-2,879.74-1,371.71

Finding the Fourth Proportional to 1,921.20, 2,879.74 and 1,371.71

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Solution

The fourth proportional to 1,921.20, 2,879.74 and 1,371.71 is: 2,056.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.20 : 2,879.74 = 1,371.71 : x
  2. Step 2: Convert to fraction form
    1,921.20/2,879.74 = 1,371.71/x
  3. Step 3: Cross multiply
    1,921.20x = 2,879.74 × 1,371.71
  4. Step 4: Simplify right side
    1,921.20x = 3,950,177.07
  5. Step 5: Solve for x
    x = 3,950,177.07/1,921.20
  6. Step 6: Final answer
    x = 2,056.10

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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.