Home / 2,190.67-3,286.91-1,314.86

Finding the Fourth Proportional to 2,190.67, 3,286.91 and 1,314.86

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Solution

The fourth proportional to 2,190.67, 3,286.91 and 1,314.86 is: 1,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.67 : 3,286.91 = 1,314.86 : x
  2. Step 2: Convert to fraction form
    2,190.67/3,286.91 = 1,314.86/x
  3. Step 3: Cross multiply
    2,190.67x = 3,286.91 × 1,314.86
  4. Step 4: Simplify right side
    2,190.67x = 4,321,813.34
  5. Step 5: Solve for x
    x = 4,321,813.34/2,190.67
  6. Step 6: Final answer
    x = 1,972.83

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1.5x scale

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.