Home / 3,122.39-4,308.78-1,863.65

Finding the Fourth Proportional to 3,122.39, 4,308.78 and 1,863.65

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Solution

The fourth proportional to 3,122.39, 4,308.78 and 1,863.65 is: 2,571.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.39 : 4,308.78 = 1,863.65 : x
  2. Step 2: Convert to fraction form
    3,122.39/4,308.78 = 1,863.65/x
  3. Step 3: Cross multiply
    3,122.39x = 4,308.78 × 1,863.65
  4. Step 4: Simplify right side
    3,122.39x = 8,030,048.53
  5. Step 5: Solve for x
    x = 8,030,048.53/3,122.39
  6. Step 6: Final answer
    x = 2,571.76

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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.