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Finding the Fourth Proportional to 278.99, 385.01 and 154.68

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Solution

The fourth proportional to 278.99, 385.01 and 154.68 is: 213.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.99 : 385.01 = 154.68 : x
  2. Step 2: Convert to fraction form
    278.99/385.01 = 154.68/x
  3. Step 3: Cross multiply
    278.99x = 385.01 × 154.68
  4. Step 4: Simplify right side
    278.99x = 59,553.35
  5. Step 5: Solve for x
    x = 59,553.35/278.99
  6. Step 6: Final answer
    x = 213.46

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