Home / 2,919.69-4,000.39-2,880.74

Finding the Fourth Proportional to 2,919.69, 4,000.39 and 2,880.74

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Solution

The fourth proportional to 2,919.69, 4,000.39 and 2,880.74 is: 3,947.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.69 : 4,000.39 = 2,880.74 : x
  2. Step 2: Convert to fraction form
    2,919.69/4,000.39 = 2,880.74/x
  3. Step 3: Cross multiply
    2,919.69x = 4,000.39 × 2,880.74
  4. Step 4: Simplify right side
    2,919.69x = 11,524,063.49
  5. Step 5: Solve for x
    x = 11,524,063.49/2,919.69
  6. Step 6: Final answer
    x = 3,947.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.