Home / 1,979.28-2,971.44-1,251.90

Finding the Fourth Proportional to 1,979.28, 2,971.44 and 1,251.90

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Solution

The fourth proportional to 1,979.28, 2,971.44 and 1,251.90 is: 1,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.28 : 2,971.44 = 1,251.90 : x
  2. Step 2: Convert to fraction form
    1,979.28/2,971.44 = 1,251.90/x
  3. Step 3: Cross multiply
    1,979.28x = 2,971.44 × 1,251.90
  4. Step 4: Simplify right side
    1,979.28x = 3,719,945.74
  5. Step 5: Solve for x
    x = 3,719,945.74/1,979.28
  6. Step 6: Final answer
    x = 1,879.44

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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.