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Finding the Fourth Proportional to 353.13, 528.98 and 287.84

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Solution

The fourth proportional to 353.13, 528.98 and 287.84 is: 431.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.13 : 528.98 = 287.84 : x
  2. Step 2: Convert to fraction form
    353.13/528.98 = 287.84/x
  3. Step 3: Cross multiply
    353.13x = 528.98 × 287.84
  4. Step 4: Simplify right side
    353.13x = 152,257.52
  5. Step 5: Solve for x
    x = 152,257.52/353.13
  6. Step 6: Final answer
    x = 431.17

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