Home / 2,979.63-4,112.25-1,800.81

Finding the Fourth Proportional to 2,979.63, 4,112.25 and 1,800.81

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Solution

The fourth proportional to 2,979.63, 4,112.25 and 1,800.81 is: 2,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.63 : 4,112.25 = 1,800.81 : x
  2. Step 2: Convert to fraction form
    2,979.63/4,112.25 = 1,800.81/x
  3. Step 3: Cross multiply
    2,979.63x = 4,112.25 × 1,800.81
  4. Step 4: Simplify right side
    2,979.63x = 7,405,380.92
  5. Step 5: Solve for x
    x = 7,405,380.92/2,979.63
  6. Step 6: Final answer
    x = 2,485.34

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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.