Home / 2,212.80-3,053.58-1,218.08

Finding the Fourth Proportional to 2,212.80, 3,053.58 and 1,218.08

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Solution

The fourth proportional to 2,212.80, 3,053.58 and 1,218.08 is: 1,680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.80 : 3,053.58 = 1,218.08 : x
  2. Step 2: Convert to fraction form
    2,212.80/3,053.58 = 1,218.08/x
  3. Step 3: Cross multiply
    2,212.80x = 3,053.58 × 1,218.08
  4. Step 4: Simplify right side
    2,212.80x = 3,719,504.73
  5. Step 5: Solve for x
    x = 3,719,504.73/2,212.80
  6. Step 6: Final answer
    x = 1,680.90

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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.