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Finding the Fourth Proportional to 2,990.69, 4,127.55 and 2,243.46

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Solution

The fourth proportional to 2,990.69, 4,127.55 and 2,243.46 is: 3,096.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.69 : 4,127.55 = 2,243.46 : x
  2. Step 2: Convert to fraction form
    2,990.69/4,127.55 = 2,243.46/x
  3. Step 3: Cross multiply
    2,990.69x = 4,127.55 × 2,243.46
  4. Step 4: Simplify right side
    2,990.69x = 9,259,993.32
  5. Step 5: Solve for x
    x = 9,259,993.32/2,990.69
  6. Step 6: Final answer
    x = 3,096.28

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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.