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Finding the Fourth Proportional to 4,990.22, 7,477.12 and 3,956.86

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Solution

The fourth proportional to 4,990.22, 7,477.12 and 3,956.86 is: 5,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.22 : 7,477.12 = 3,956.86 : x
  2. Step 2: Convert to fraction form
    4,990.22/7,477.12 = 3,956.86/x
  3. Step 3: Cross multiply
    4,990.22x = 7,477.12 × 3,956.86
  4. Step 4: Simplify right side
    4,990.22x = 29,585,917.04
  5. Step 5: Solve for x
    x = 29,585,917.04/4,990.22
  6. Step 6: Final answer
    x = 5,928.78

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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.