Home / 3,105.36-4,284.96-1,778.78

Finding the Fourth Proportional to 3,105.36, 4,284.96 and 1,778.78

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Solution

The fourth proportional to 3,105.36, 4,284.96 and 1,778.78 is: 2,454.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.36 : 4,284.96 = 1,778.78 : x
  2. Step 2: Convert to fraction form
    3,105.36/4,284.96 = 1,778.78/x
  3. Step 3: Cross multiply
    3,105.36x = 4,284.96 × 1,778.78
  4. Step 4: Simplify right side
    3,105.36x = 7,622,001.15
  5. Step 5: Solve for x
    x = 7,622,001.15/3,105.36
  6. Step 6: Final answer
    x = 2,454.47

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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.