Home / 3,119.87-4,305.95-2,979.74

Finding the Fourth Proportional to 3,119.87, 4,305.95 and 2,979.74

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Solution

The fourth proportional to 3,119.87, 4,305.95 and 2,979.74 is: 4,112.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.87 : 4,305.95 = 2,979.74 : x
  2. Step 2: Convert to fraction form
    3,119.87/4,305.95 = 2,979.74/x
  3. Step 3: Cross multiply
    3,119.87x = 4,305.95 × 2,979.74
  4. Step 4: Simplify right side
    3,119.87x = 12,830,575.02
  5. Step 5: Solve for x
    x = 12,830,575.02/3,119.87
  6. Step 6: Final answer
    x = 4,112.54

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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.