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Finding the Fourth Proportional to 630.72, 945.84 and 357

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Solution

The fourth proportional to 630.72, 945.84 and 357 is: 535.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.72 : 945.84 = 357 : x
  2. Step 2: Convert to fraction form
    630.72/945.84 = 357/x
  3. Step 3: Cross multiply
    630.72x = 945.84 × 357
  4. Step 4: Simplify right side
    630.72x = 337,664.88
  5. Step 5: Solve for x
    x = 337,664.88/630.72
  6. Step 6: Final answer
    x = 535.36

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