Home / 3,221.88-4,443.66-2,159.28

Finding the Fourth Proportional to 3,221.88, 4,443.66 and 2,159.28

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Solution

The fourth proportional to 3,221.88, 4,443.66 and 2,159.28 is: 2,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.88 : 4,443.66 = 2,159.28 : x
  2. Step 2: Convert to fraction form
    3,221.88/4,443.66 = 2,159.28/x
  3. Step 3: Cross multiply
    3,221.88x = 4,443.66 × 2,159.28
  4. Step 4: Simplify right side
    3,221.88x = 9,595,118.66
  5. Step 5: Solve for x
    x = 9,595,118.66/3,221.88
  6. Step 6: Final answer
    x = 2,978.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.