Home / 3,519.87-5,279.30-1,328.31

Finding the Fourth Proportional to 3,519.87, 5,279.30 and 1,328.31

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Solution

The fourth proportional to 3,519.87, 5,279.30 and 1,328.31 is: 1,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,519.87 : 5,279.30 = 1,328.31 : x
  2. Step 2: Convert to fraction form
    3,519.87/5,279.30 = 1,328.31/x
  3. Step 3: Cross multiply
    3,519.87x = 5,279.30 × 1,328.31
  4. Step 4: Simplify right side
    3,519.87x = 7,012,540.34
  5. Step 5: Solve for x
    x = 7,012,540.34/3,519.87
  6. Step 6: Final answer
    x = 1,992.27

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1.5x scale

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.