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Finding the Fourth Proportional to 603.99, 905.30 and 256.82

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Solution

The fourth proportional to 603.99, 905.30 and 256.82 is: 384.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.99 : 905.30 = 256.82 : x
  2. Step 2: Convert to fraction form
    603.99/905.30 = 256.82/x
  3. Step 3: Cross multiply
    603.99x = 905.30 × 256.82
  4. Step 4: Simplify right side
    603.99x = 232,493.34
  5. Step 5: Solve for x
    x = 232,493.34/603.99
  6. Step 6: Final answer
    x = 384.93

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