Home / 3,519.80-5,279.00-1,021.28

Finding the Fourth Proportional to 3,519.80, 5,279.00 and 1,021.28

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Solution

The fourth proportional to 3,519.80, 5,279.00 and 1,021.28 is: 1,531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.80 : 5,279.00 = 1,021.28 : x
  2. Step 2: Convert to fraction form
    3,519.80/5,279.00 = 1,021.28/x
  3. Step 3: Cross multiply
    3,519.80x = 5,279.00 × 1,021.28
  4. Step 4: Simplify right side
    3,519.80x = 5,391,305.62
  5. Step 5: Solve for x
    x = 5,391,305.62/3,519.80
  6. Step 6: Final answer
    x = 1,531.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.