Home / 2,115.21-3,175.05-1,729.65

Finding the Fourth Proportional to 2,115.21, 3,175.05 and 1,729.65

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Solution

The fourth proportional to 2,115.21, 3,175.05 and 1,729.65 is: 2,596.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.21 : 3,175.05 = 1,729.65 : x
  2. Step 2: Convert to fraction form
    2,115.21/3,175.05 = 1,729.65/x
  3. Step 3: Cross multiply
    2,115.21x = 3,175.05 × 1,729.65
  4. Step 4: Simplify right side
    2,115.21x = 5,491,725.23
  5. Step 5: Solve for x
    x = 5,491,725.23/2,115.21
  6. Step 6: Final answer
    x = 2,596.30

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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.