Home / 2,211.92-3,315.14-1,115.69

Finding the Fourth Proportional to 2,211.92, 3,315.14 and 1,115.69

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Solution

The fourth proportional to 2,211.92, 3,315.14 and 1,115.69 is: 1,672.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.92 : 3,315.14 = 1,115.69 : x
  2. Step 2: Convert to fraction form
    2,211.92/3,315.14 = 1,115.69/x
  3. Step 3: Cross multiply
    2,211.92x = 3,315.14 × 1,115.69
  4. Step 4: Simplify right side
    2,211.92x = 3,698,650.58
  5. Step 5: Solve for x
    x = 3,698,650.58/2,211.92
  6. Step 6: Final answer
    x = 1,672.15

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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.