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Finding the Fourth Proportional to 278.28, 417.47 and 95.63

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Solution

The fourth proportional to 278.28, 417.47 and 95.63 is: 143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.28 : 417.47 = 95.63 : x
  2. Step 2: Convert to fraction form
    278.28/417.47 = 95.63/x
  3. Step 3: Cross multiply
    278.28x = 417.47 × 95.63
  4. Step 4: Simplify right side
    278.28x = 39,921.66
  5. Step 5: Solve for x
    x = 39,921.66/278.28
  6. Step 6: Final answer
    x = 143.46

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