Home / 1,939.54-2,673.82-1,379.80

Finding the Fourth Proportional to 1,939.54, 2,673.82 and 1,379.80

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Solution

The fourth proportional to 1,939.54, 2,673.82 and 1,379.80 is: 1,902.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.54 : 2,673.82 = 1,379.80 : x
  2. Step 2: Convert to fraction form
    1,939.54/2,673.82 = 1,379.80/x
  3. Step 3: Cross multiply
    1,939.54x = 2,673.82 × 1,379.80
  4. Step 4: Simplify right side
    1,939.54x = 3,689,336.84
  5. Step 5: Solve for x
    x = 3,689,336.84/1,939.54
  6. Step 6: Final answer
    x = 1,902.17

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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.