Home / 2,979.58-4,112.68-1,800.74

Finding the Fourth Proportional to 2,979.58, 4,112.68 and 1,800.74

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Solution

The fourth proportional to 2,979.58, 4,112.68 and 1,800.74 is: 2,485.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.58 : 4,112.68 = 1,800.74 : x
  2. Step 2: Convert to fraction form
    2,979.58/4,112.68 = 1,800.74/x
  3. Step 3: Cross multiply
    2,979.58x = 4,112.68 × 1,800.74
  4. Step 4: Simplify right side
    2,979.58x = 7,405,867.38
  5. Step 5: Solve for x
    x = 7,405,867.38/2,979.58
  6. Step 6: Final answer
    x = 2,485.54

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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.