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Finding the Fourth Proportional to 285.82, 428.87 and 141.46

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Solution

The fourth proportional to 285.82, 428.87 and 141.46 is: 212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.82 : 428.87 = 141.46 : x
  2. Step 2: Convert to fraction form
    285.82/428.87 = 141.46/x
  3. Step 3: Cross multiply
    285.82x = 428.87 × 141.46
  4. Step 4: Simplify right side
    285.82x = 60,667.95
  5. Step 5: Solve for x
    x = 60,667.95/285.82
  6. Step 6: Final answer
    x = 212.26

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