Home / 2,786.16-4,178.94-1,398.36

Finding the Fourth Proportional to 2,786.16, 4,178.94 and 1,398.36

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Solution

The fourth proportional to 2,786.16, 4,178.94 and 1,398.36 is: 2,097.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.16 : 4,178.94 = 1,398.36 : x
  2. Step 2: Convert to fraction form
    2,786.16/4,178.94 = 1,398.36/x
  3. Step 3: Cross multiply
    2,786.16x = 4,178.94 × 1,398.36
  4. Step 4: Simplify right side
    2,786.16x = 5,843,662.54
  5. Step 5: Solve for x
    x = 5,843,662.54/2,786.16
  6. Step 6: Final answer
    x = 2,097.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.