Home / 3,279-4,919.84-1,429.16

Finding the Fourth Proportional to 3,279, 4,919.84 and 1,429.16

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Solution

The fourth proportional to 3,279, 4,919.84 and 1,429.16 is: 2,144.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279 : 4,919.84 = 1,429.16 : x
  2. Step 2: Convert to fraction form
    3,279/4,919.84 = 1,429.16/x
  3. Step 3: Cross multiply
    3,279x = 4,919.84 × 1,429.16
  4. Step 4: Simplify right side
    3,279x = 7,031,238.53
  5. Step 5: Solve for x
    x = 7,031,238.53/3,279
  6. Step 6: Final answer
    x = 2,144.32

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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.