Home / 2,311.92-3,190.28-1,317.22

Finding the Fourth Proportional to 2,311.92, 3,190.28 and 1,317.22

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Solution

The fourth proportional to 2,311.92, 3,190.28 and 1,317.22 is: 1,817.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.92 : 3,190.28 = 1,317.22 : x
  2. Step 2: Convert to fraction form
    2,311.92/3,190.28 = 1,317.22/x
  3. Step 3: Cross multiply
    2,311.92x = 3,190.28 × 1,317.22
  4. Step 4: Simplify right side
    2,311.92x = 4,202,300.62
  5. Step 5: Solve for x
    x = 4,202,300.62/2,311.92
  6. Step 6: Final answer
    x = 1,817.67

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1.5x scale

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.