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Finding the Fourth Proportional to 1,939.41, 2,676.41 and 1,055.22

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Solution

The fourth proportional to 1,939.41, 2,676.41 and 1,055.22 is: 1,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.41 : 2,676.41 = 1,055.22 : x
  2. Step 2: Convert to fraction form
    1,939.41/2,676.41 = 1,055.22/x
  3. Step 3: Cross multiply
    1,939.41x = 2,676.41 × 1,055.22
  4. Step 4: Simplify right side
    1,939.41x = 2,824,196.08
  5. Step 5: Solve for x
    x = 2,824,196.08/1,939.41
  6. Step 6: Final answer
    x = 1,456.21

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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.