Home / 1,939.80-2,675.72-1,691.72

Finding the Fourth Proportional to 1,939.80, 2,675.72 and 1,691.72

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Solution

The fourth proportional to 1,939.80, 2,675.72 and 1,691.72 is: 2,333.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.80 : 2,675.72 = 1,691.72 : x
  2. Step 2: Convert to fraction form
    1,939.80/2,675.72 = 1,691.72/x
  3. Step 3: Cross multiply
    1,939.80x = 2,675.72 × 1,691.72
  4. Step 4: Simplify right side
    1,939.80x = 4,526,555.66
  5. Step 5: Solve for x
    x = 4,526,555.66/1,939.80
  6. Step 6: Final answer
    x = 2,333.52

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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.