Home / 2,086.87-2,879.40-1,247.44

Finding the Fourth Proportional to 2,086.87, 2,879.40 and 1,247.44

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Solution

The fourth proportional to 2,086.87, 2,879.40 and 1,247.44 is: 1,721.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.87 : 2,879.40 = 1,247.44 : x
  2. Step 2: Convert to fraction form
    2,086.87/2,879.40 = 1,247.44/x
  3. Step 3: Cross multiply
    2,086.87x = 2,879.40 × 1,247.44
  4. Step 4: Simplify right side
    2,086.87x = 3,591,878.74
  5. Step 5: Solve for x
    x = 3,591,878.74/2,086.87
  6. Step 6: Final answer
    x = 1,721.18

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1.5x scale

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.