Home / 3,105.80-4,285.77-1,708.64

Finding the Fourth Proportional to 3,105.80, 4,285.77 and 1,708.64

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Solution

The fourth proportional to 3,105.80, 4,285.77 and 1,708.64 is: 2,357.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.80 : 4,285.77 = 1,708.64 : x
  2. Step 2: Convert to fraction form
    3,105.80/4,285.77 = 1,708.64/x
  3. Step 3: Cross multiply
    3,105.80x = 4,285.77 × 1,708.64
  4. Step 4: Simplify right side
    3,105.80x = 7,322,838.05
  5. Step 5: Solve for x
    x = 7,322,838.05/3,105.80
  6. Step 6: Final answer
    x = 2,357.79

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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.