Home / 1,939.82-2,676.90-1,055.61

Finding the Fourth Proportional to 1,939.82, 2,676.90 and 1,055.61

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Solution

The fourth proportional to 1,939.82, 2,676.90 and 1,055.61 is: 1,456.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.82 : 2,676.90 = 1,055.61 : x
  2. Step 2: Convert to fraction form
    1,939.82/2,676.90 = 1,055.61/x
  3. Step 3: Cross multiply
    1,939.82x = 2,676.90 × 1,055.61
  4. Step 4: Simplify right side
    1,939.82x = 2,825,762.41
  5. Step 5: Solve for x
    x = 2,825,762.41/1,939.82
  6. Step 6: Final answer
    x = 1,456.72

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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.