Home / 2,211.78-3,052.31-1,217.09

Finding the Fourth Proportional to 2,211.78, 3,052.31 and 1,217.09

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Solution

The fourth proportional to 2,211.78, 3,052.31 and 1,217.09 is: 1,679.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.78 : 3,052.31 = 1,217.09 : x
  2. Step 2: Convert to fraction form
    2,211.78/3,052.31 = 1,217.09/x
  3. Step 3: Cross multiply
    2,211.78x = 3,052.31 × 1,217.09
  4. Step 4: Simplify right side
    2,211.78x = 3,714,914.63
  5. Step 5: Solve for x
    x = 3,714,914.63/2,211.78
  6. Step 6: Final answer
    x = 1,679.60

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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.