Home / 3,106.30-4,286.79-1,690.09

Finding the Fourth Proportional to 3,106.30, 4,286.79 and 1,690.09

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Solution

The fourth proportional to 3,106.30, 4,286.79 and 1,690.09 is: 2,332.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.30 : 4,286.79 = 1,690.09 : x
  2. Step 2: Convert to fraction form
    3,106.30/4,286.79 = 1,690.09/x
  3. Step 3: Cross multiply
    3,106.30x = 4,286.79 × 1,690.09
  4. Step 4: Simplify right side
    3,106.30x = 7,245,060.91
  5. Step 5: Solve for x
    x = 7,245,060.91/3,106.30
  6. Step 6: Final answer
    x = 2,332.38

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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.