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Finding the Fourth Proportional to 2,990.78, 4,127.27 and 1,664.60

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Solution

The fourth proportional to 2,990.78, 4,127.27 and 1,664.60 is: 2,297.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.78 : 4,127.27 = 1,664.60 : x
  2. Step 2: Convert to fraction form
    2,990.78/4,127.27 = 1,664.60/x
  3. Step 3: Cross multiply
    2,990.78x = 4,127.27 × 1,664.60
  4. Step 4: Simplify right side
    2,990.78x = 6,870,224.68
  5. Step 5: Solve for x
    x = 6,870,224.68/2,990.78
  6. Step 6: Final answer
    x = 2,297.14

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