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Finding the Fourth Proportional to 3,990.83, 5,509.28 and 2,499.57

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Solution

The fourth proportional to 3,990.83, 5,509.28 and 2,499.57 is: 3,450.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.83 : 5,509.28 = 2,499.57 : x
  2. Step 2: Convert to fraction form
    3,990.83/5,509.28 = 2,499.57/x
  3. Step 3: Cross multiply
    3,990.83x = 5,509.28 × 2,499.57
  4. Step 4: Simplify right side
    3,990.83x = 13,770,831.01
  5. Step 5: Solve for x
    x = 13,770,831.01/3,990.83
  6. Step 6: Final answer
    x = 3,450.62

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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.