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Finding the Fourth Proportional to 285.73, 428.56 and 170.98

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Solution

The fourth proportional to 285.73, 428.56 and 170.98 is: 256.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.73 : 428.56 = 170.98 : x
  2. Step 2: Convert to fraction form
    285.73/428.56 = 170.98/x
  3. Step 3: Cross multiply
    285.73x = 428.56 × 170.98
  4. Step 4: Simplify right side
    285.73x = 73,273.69
  5. Step 5: Solve for x
    x = 73,273.69/285.73
  6. Step 6: Final answer
    x = 256.45

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