Home / 2,086.39-2,879.18-1,247.28

Finding the Fourth Proportional to 2,086.39, 2,879.18 and 1,247.28

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Solution

The fourth proportional to 2,086.39, 2,879.18 and 1,247.28 is: 1,721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.39 : 2,879.18 = 1,247.28 : x
  2. Step 2: Convert to fraction form
    2,086.39/2,879.18 = 1,247.28/x
  3. Step 3: Cross multiply
    2,086.39x = 2,879.18 × 1,247.28
  4. Step 4: Simplify right side
    2,086.39x = 3,591,137.39
  5. Step 5: Solve for x
    x = 3,591,137.39/2,086.39
  6. Step 6: Final answer
    x = 1,721.22

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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.