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Finding the Fourth Proportional to 1,139.76, 1,706.94 and 894.60

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Solution

The fourth proportional to 1,139.76, 1,706.94 and 894.60 is: 1,339.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.76 : 1,706.94 = 894.60 : x
  2. Step 2: Convert to fraction form
    1,139.76/1,706.94 = 894.60/x
  3. Step 3: Cross multiply
    1,139.76x = 1,706.94 × 894.60
  4. Step 4: Simplify right side
    1,139.76x = 1,527,028.52
  5. Step 5: Solve for x
    x = 1,527,028.52/1,139.76
  6. Step 6: Final answer
    x = 1,339.78

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