Home / 2,212.72-3,053.43-1,217.80

Finding the Fourth Proportional to 2,212.72, 3,053.43 and 1,217.80

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Solution

The fourth proportional to 2,212.72, 3,053.43 and 1,217.80 is: 1,680.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.72 : 3,053.43 = 1,217.80 : x
  2. Step 2: Convert to fraction form
    2,212.72/3,053.43 = 1,217.80/x
  3. Step 3: Cross multiply
    2,212.72x = 3,053.43 × 1,217.80
  4. Step 4: Simplify right side
    2,212.72x = 3,718,467.05
  5. Step 5: Solve for x
    x = 3,718,467.05/2,212.72
  6. Step 6: Final answer
    x = 1,680.50

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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.