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Finding the Fourth Proportional to 3,990.96, 5,999.88 and 3,265.80

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Solution

The fourth proportional to 3,990.96, 5,999.88 and 3,265.80 is: 4,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.96 : 5,999.88 = 3,265.80 : x
  2. Step 2: Convert to fraction form
    3,990.96/5,999.88 = 3,265.80/x
  3. Step 3: Cross multiply
    3,990.96x = 5,999.88 × 3,265.80
  4. Step 4: Simplify right side
    3,990.96x = 19,594,408.10
  5. Step 5: Solve for x
    x = 19,594,408.10/3,990.96
  6. Step 6: Final answer
    x = 4,909.70

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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.