Home / 2,179.16-3,268.86-640.28

Finding the Fourth Proportional to 2,179.16, 3,268.86 and 640.28

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Solution

The fourth proportional to 2,179.16, 3,268.86 and 640.28 is: 960.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.16 : 3,268.86 = 640.28 : x
  2. Step 2: Convert to fraction form
    2,179.16/3,268.86 = 640.28/x
  3. Step 3: Cross multiply
    2,179.16x = 3,268.86 × 640.28
  4. Step 4: Simplify right side
    2,179.16x = 2,092,985.68
  5. Step 5: Solve for x
    x = 2,092,985.68/2,179.16
  6. Step 6: Final answer
    x = 960.46

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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.