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Finding the Fourth Proportional to 486.24, 671.01 and 289.77

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Solution

The fourth proportional to 486.24, 671.01 and 289.77 is: 399.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.24 : 671.01 = 289.77 : x
  2. Step 2: Convert to fraction form
    486.24/671.01 = 289.77/x
  3. Step 3: Cross multiply
    486.24x = 671.01 × 289.77
  4. Step 4: Simplify right side
    486.24x = 194,438.57
  5. Step 5: Solve for x
    x = 194,438.57/486.24
  6. Step 6: Final answer
    x = 399.88

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