Home / 1,721.40-2,375.82-1,131.90

Finding the Fourth Proportional to 1,721.40, 2,375.82 and 1,131.90

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Solution

The fourth proportional to 1,721.40, 2,375.82 and 1,131.90 is: 1,562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.40 : 2,375.82 = 1,131.90 : x
  2. Step 2: Convert to fraction form
    1,721.40/2,375.82 = 1,131.90/x
  3. Step 3: Cross multiply
    1,721.40x = 2,375.82 × 1,131.90
  4. Step 4: Simplify right side
    1,721.40x = 2,689,190.66
  5. Step 5: Solve for x
    x = 2,689,190.66/1,721.40
  6. Step 6: Final answer
    x = 1,562.21

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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.