Home / 2,778.39-4,161.47-1,999.91

Finding the Fourth Proportional to 2,778.39, 4,161.47 and 1,999.91

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Solution

The fourth proportional to 2,778.39, 4,161.47 and 1,999.91 is: 2,995.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.39 : 4,161.47 = 1,999.91 : x
  2. Step 2: Convert to fraction form
    2,778.39/4,161.47 = 1,999.91/x
  3. Step 3: Cross multiply
    2,778.39x = 4,161.47 × 1,999.91
  4. Step 4: Simplify right side
    2,778.39x = 8,322,565.87
  5. Step 5: Solve for x
    x = 8,322,565.87/2,778.39
  6. Step 6: Final answer
    x = 2,995.46

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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.