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Finding the Fourth Proportional to 2,811.06, 4,213.62 and 936.44

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Solution

The fourth proportional to 2,811.06, 4,213.62 and 936.44 is: 1,403.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.06 : 4,213.62 = 936.44 : x
  2. Step 2: Convert to fraction form
    2,811.06/4,213.62 = 936.44/x
  3. Step 3: Cross multiply
    2,811.06x = 4,213.62 × 936.44
  4. Step 4: Simplify right side
    2,811.06x = 3,945,812.85
  5. Step 5: Solve for x
    x = 3,945,812.85/2,811.06
  6. Step 6: Final answer
    x = 1,403.67

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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.