Home / 2,212.95-3,321.48-1,118.09

Finding the Fourth Proportional to 2,212.95, 3,321.48 and 1,118.09

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Solution

The fourth proportional to 2,212.95, 3,321.48 and 1,118.09 is: 1,678.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.95 : 3,321.48 = 1,118.09 : x
  2. Step 2: Convert to fraction form
    2,212.95/3,321.48 = 1,118.09/x
  3. Step 3: Cross multiply
    2,212.95x = 3,321.48 × 1,118.09
  4. Step 4: Simplify right side
    2,212.95x = 3,713,696.97
  5. Step 5: Solve for x
    x = 3,713,696.97/2,212.95
  6. Step 6: Final answer
    x = 1,678.17

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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.