Home / 2,872.87-3,964.85-1,878.69

Finding the Fourth Proportional to 2,872.87, 3,964.85 and 1,878.69

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Solution

The fourth proportional to 2,872.87, 3,964.85 and 1,878.69 is: 2,592.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.87 : 3,964.85 = 1,878.69 : x
  2. Step 2: Convert to fraction form
    2,872.87/3,964.85 = 1,878.69/x
  3. Step 3: Cross multiply
    2,872.87x = 3,964.85 × 1,878.69
  4. Step 4: Simplify right side
    2,872.87x = 7,448,736.57
  5. Step 5: Solve for x
    x = 7,448,736.57/2,872.87
  6. Step 6: Final answer
    x = 2,592.79

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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.