Home / 3,105.20-4,286.64-1,778.64

Finding the Fourth Proportional to 3,105.20, 4,286.64 and 1,778.64

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Solution

The fourth proportional to 3,105.20, 4,286.64 and 1,778.64 is: 2,455.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.20 : 4,286.64 = 1,778.64 : x
  2. Step 2: Convert to fraction form
    3,105.20/4,286.64 = 1,778.64/x
  3. Step 3: Cross multiply
    3,105.20x = 4,286.64 × 1,778.64
  4. Step 4: Simplify right side
    3,105.20x = 7,624,389.37
  5. Step 5: Solve for x
    x = 7,624,389.37/3,105.20
  6. Step 6: Final answer
    x = 2,455.36

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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.