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Finding the Fourth Proportional to 528.15, 792.58 and 220

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Solution

The fourth proportional to 528.15, 792.58 and 220 is: 330.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.15 : 792.58 = 220 : x
  2. Step 2: Convert to fraction form
    528.15/792.58 = 220/x
  3. Step 3: Cross multiply
    528.15x = 792.58 × 220
  4. Step 4: Simplify right side
    528.15x = 174,367.60
  5. Step 5: Solve for x
    x = 174,367.60/528.15
  6. Step 6: Final answer
    x = 330.15

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