Home / 3,429.21-5,139.77-1,479

Finding the Fourth Proportional to 3,429.21, 5,139.77 and 1,479

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Solution

The fourth proportional to 3,429.21, 5,139.77 and 1,479 is: 2,216.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.21 : 5,139.77 = 1,479 : x
  2. Step 2: Convert to fraction form
    3,429.21/5,139.77 = 1,479/x
  3. Step 3: Cross multiply
    3,429.21x = 5,139.77 × 1,479
  4. Step 4: Simplify right side
    3,429.21x = 7,601,712.44
  5. Step 5: Solve for x
    x = 7,601,712.44/3,429.21
  6. Step 6: Final answer
    x = 2,216.75

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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.