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Finding the Fourth Proportional to 3,900.15, 5,365.44 and 3,790.80

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Solution

The fourth proportional to 3,900.15, 5,365.44 and 3,790.80 is: 5,215.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.15 : 5,365.44 = 3,790.80 : x
  2. Step 2: Convert to fraction form
    3,900.15/5,365.44 = 3,790.80/x
  3. Step 3: Cross multiply
    3,900.15x = 5,365.44 × 3,790.80
  4. Step 4: Simplify right side
    3,900.15x = 20,339,309.95
  5. Step 5: Solve for x
    x = 20,339,309.95/3,900.15
  6. Step 6: Final answer
    x = 5,215.01

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.