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Finding the Fourth Proportional to 361.58, 498.51 and 287.76

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Solution

The fourth proportional to 361.58, 498.51 and 287.76 is: 396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.58 : 498.51 = 287.76 : x
  2. Step 2: Convert to fraction form
    361.58/498.51 = 287.76/x
  3. Step 3: Cross multiply
    361.58x = 498.51 × 287.76
  4. Step 4: Simplify right side
    361.58x = 143,451.24
  5. Step 5: Solve for x
    x = 143,451.24/361.58
  6. Step 6: Final answer
    x = 396.74

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