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Finding the Fourth Proportional to 5,285.27, 7,927.28 and 1,389.98

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Solution

The fourth proportional to 5,285.27, 7,927.28 and 1,389.98 is: 2,084.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.27 : 7,927.28 = 1,389.98 : x
  2. Step 2: Convert to fraction form
    5,285.27/7,927.28 = 1,389.98/x
  3. Step 3: Cross multiply
    5,285.27x = 7,927.28 × 1,389.98
  4. Step 4: Simplify right side
    5,285.27x = 11,018,778.74
  5. Step 5: Solve for x
    x = 11,018,778.74/5,285.27
  6. Step 6: Final answer
    x = 2,084.81

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