Home / 1,939.20-2,903.09-1,279.86

Finding the Fourth Proportional to 1,939.20, 2,903.09 and 1,279.86

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Solution

The fourth proportional to 1,939.20, 2,903.09 and 1,279.86 is: 1,916.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.20 : 2,903.09 = 1,279.86 : x
  2. Step 2: Convert to fraction form
    1,939.20/2,903.09 = 1,279.86/x
  3. Step 3: Cross multiply
    1,939.20x = 2,903.09 × 1,279.86
  4. Step 4: Simplify right side
    1,939.20x = 3,715,542.37
  5. Step 5: Solve for x
    x = 3,715,542.37/1,939.20
  6. Step 6: Final answer
    x = 1,916.02

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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.