Home / 2,128.32-3,198.72-1,765.44

Finding the Fourth Proportional to 2,128.32, 3,198.72 and 1,765.44

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Solution

The fourth proportional to 2,128.32, 3,198.72 and 1,765.44 is: 2,653.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.32 : 3,198.72 = 1,765.44 : x
  2. Step 2: Convert to fraction form
    2,128.32/3,198.72 = 1,765.44/x
  3. Step 3: Cross multiply
    2,128.32x = 3,198.72 × 1,765.44
  4. Step 4: Simplify right side
    2,128.32x = 5,647,148.24
  5. Step 5: Solve for x
    x = 5,647,148.24/2,128.32
  6. Step 6: Final answer
    x = 2,653.34

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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.