Home / 3,105.80-4,285.91-1,708.55

Finding the Fourth Proportional to 3,105.80, 4,285.91 and 1,708.55

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Solution

The fourth proportional to 3,105.80, 4,285.91 and 1,708.55 is: 2,357.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.80 : 4,285.91 = 1,708.55 : x
  2. Step 2: Convert to fraction form
    3,105.80/4,285.91 = 1,708.55/x
  3. Step 3: Cross multiply
    3,105.80x = 4,285.91 × 1,708.55
  4. Step 4: Simplify right side
    3,105.80x = 7,322,691.53
  5. Step 5: Solve for x
    x = 7,322,691.53/3,105.80
  6. Step 6: Final answer
    x = 2,357.75

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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.