Home / 1,939.22-2,906.39-1,392.47

Finding the Fourth Proportional to 1,939.22, 2,906.39 and 1,392.47

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Solution

The fourth proportional to 1,939.22, 2,906.39 and 1,392.47 is: 2,086.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.22 : 2,906.39 = 1,392.47 : x
  2. Step 2: Convert to fraction form
    1,939.22/2,906.39 = 1,392.47/x
  3. Step 3: Cross multiply
    1,939.22x = 2,906.39 × 1,392.47
  4. Step 4: Simplify right side
    1,939.22x = 4,047,060.88
  5. Step 5: Solve for x
    x = 4,047,060.88/1,939.22
  6. Step 6: Final answer
    x = 2,086.95

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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.