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Finding the Fourth Proportional to 436.76, 603.11 and 289.47

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Solution

The fourth proportional to 436.76, 603.11 and 289.47 is: 399.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.76 : 603.11 = 289.47 : x
  2. Step 2: Convert to fraction form
    436.76/603.11 = 289.47/x
  3. Step 3: Cross multiply
    436.76x = 603.11 × 289.47
  4. Step 4: Simplify right side
    436.76x = 174,585.24
  5. Step 5: Solve for x
    x = 174,585.24/436.76
  6. Step 6: Final answer
    x = 399.73

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