Home / 2,212.12-3,052.64-1,217.30

Finding the Fourth Proportional to 2,212.12, 3,052.64 and 1,217.30

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Solution

The fourth proportional to 2,212.12, 3,052.64 and 1,217.30 is: 1,679.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.12 : 3,052.64 = 1,217.30 : x
  2. Step 2: Convert to fraction form
    2,212.12/3,052.64 = 1,217.30/x
  3. Step 3: Cross multiply
    2,212.12x = 3,052.64 × 1,217.30
  4. Step 4: Simplify right side
    2,212.12x = 3,715,978.67
  5. Step 5: Solve for x
    x = 3,715,978.67/2,212.12
  6. Step 6: Final answer
    x = 1,679.83

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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.