Home / 1,879.26-2,809.28-1,387.74

Finding the Fourth Proportional to 1,879.26, 2,809.28 and 1,387.74

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Solution

The fourth proportional to 1,879.26, 2,809.28 and 1,387.74 is: 2,074.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.26 : 2,809.28 = 1,387.74 : x
  2. Step 2: Convert to fraction form
    1,879.26/2,809.28 = 1,387.74/x
  3. Step 3: Cross multiply
    1,879.26x = 2,809.28 × 1,387.74
  4. Step 4: Simplify right side
    1,879.26x = 3,898,550.23
  5. Step 5: Solve for x
    x = 3,898,550.23/1,879.26
  6. Step 6: Final answer
    x = 2,074.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.