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Finding the Fourth Proportional to 3,990.96, 5,986.67 and 1,217.73

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Solution

The fourth proportional to 3,990.96, 5,986.67 and 1,217.73 is: 1,826.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.96 : 5,986.67 = 1,217.73 : x
  2. Step 2: Convert to fraction form
    3,990.96/5,986.67 = 1,217.73/x
  3. Step 3: Cross multiply
    3,990.96x = 5,986.67 × 1,217.73
  4. Step 4: Simplify right side
    3,990.96x = 7,290,147.66
  5. Step 5: Solve for x
    x = 7,290,147.66/3,990.96
  6. Step 6: Final answer
    x = 1,826.67

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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.