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Finding the Fourth Proportional to 2,179.12, 3,268.12 and 879.92

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Solution

The fourth proportional to 2,179.12, 3,268.12 and 879.92 is: 1,319.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.12 : 3,268.12 = 879.92 : x
  2. Step 2: Convert to fraction form
    2,179.12/3,268.12 = 879.92/x
  3. Step 3: Cross multiply
    2,179.12x = 3,268.12 × 879.92
  4. Step 4: Simplify right side
    2,179.12x = 2,875,684.15
  5. Step 5: Solve for x
    x = 2,875,684.15/2,179.12
  6. Step 6: Final answer
    x = 1,319.65

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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.