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Finding the Fourth Proportional to 463.78, 695.74 and 139.17

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Solution

The fourth proportional to 463.78, 695.74 and 139.17 is: 208.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.78 : 695.74 = 139.17 : x
  2. Step 2: Convert to fraction form
    463.78/695.74 = 139.17/x
  3. Step 3: Cross multiply
    463.78x = 695.74 × 139.17
  4. Step 4: Simplify right side
    463.78x = 96,826.14
  5. Step 5: Solve for x
    x = 96,826.14/463.78
  6. Step 6: Final answer
    x = 208.78

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