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Finding the Fourth Proportional to 3,999.69, 5,999.50 and 3,122.92

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Solution

The fourth proportional to 3,999.69, 5,999.50 and 3,122.92 is: 4,684.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.69 : 5,999.50 = 3,122.92 : x
  2. Step 2: Convert to fraction form
    3,999.69/5,999.50 = 3,122.92/x
  3. Step 3: Cross multiply
    3,999.69x = 5,999.50 × 3,122.92
  4. Step 4: Simplify right side
    3,999.69x = 18,735,958.54
  5. Step 5: Solve for x
    x = 18,735,958.54/3,999.69
  6. Step 6: Final answer
    x = 4,684.35

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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.