Home / 3,119.31-4,305.18-2,979.18

Finding the Fourth Proportional to 3,119.31, 4,305.18 and 2,979.18

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Solution

The fourth proportional to 3,119.31, 4,305.18 and 2,979.18 is: 4,111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.31 : 4,305.18 = 2,979.18 : x
  2. Step 2: Convert to fraction form
    3,119.31/4,305.18 = 2,979.18/x
  3. Step 3: Cross multiply
    3,119.31x = 4,305.18 × 2,979.18
  4. Step 4: Simplify right side
    3,119.31x = 12,825,917.32
  5. Step 5: Solve for x
    x = 12,825,917.32/3,119.31
  6. Step 6: Final answer
    x = 4,111.78

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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.