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Finding the Fourth Proportional to 3,998.84, 5,999.99 and 2,147.79

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Solution

The fourth proportional to 3,998.84, 5,999.99 and 2,147.79 is: 3,222.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.84 : 5,999.99 = 2,147.79 : x
  2. Step 2: Convert to fraction form
    3,998.84/5,999.99 = 2,147.79/x
  3. Step 3: Cross multiply
    3,998.84x = 5,999.99 × 2,147.79
  4. Step 4: Simplify right side
    3,998.84x = 12,886,707.78
  5. Step 5: Solve for x
    x = 12,886,707.78/3,998.84
  6. Step 6: Final answer
    x = 3,222.62

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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.