Home / 3,106.42-4,286.94-1,690.20

Finding the Fourth Proportional to 3,106.42, 4,286.94 and 1,690.20

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Solution

The fourth proportional to 3,106.42, 4,286.94 and 1,690.20 is: 2,332.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.42 : 4,286.94 = 1,690.20 : x
  2. Step 2: Convert to fraction form
    3,106.42/4,286.94 = 1,690.20/x
  3. Step 3: Cross multiply
    3,106.42x = 4,286.94 × 1,690.20
  4. Step 4: Simplify right side
    3,106.42x = 7,245,785.99
  5. Step 5: Solve for x
    x = 7,245,785.99/3,106.42
  6. Step 6: Final answer
    x = 2,332.52

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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.