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Finding the Fourth Proportional to 511,085.12, 705,287.96 and 281,663.68

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Solution

The fourth proportional to 511,085.12, 705,287.96 and 281,663.68 is: 388,690.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,085.12 : 705,287.96 = 281,663.68 : x
  2. Step 2: Convert to fraction form
    511,085.12/705,287.96 = 281,663.68/x
  3. Step 3: Cross multiply
    511,085.12x = 705,287.96 × 281,663.68
  4. Step 4: Simplify right side
    511,085.12x = 198,654,002,273.29
  5. Step 5: Solve for x
    x = 198,654,002,273.29/511,085.12
  6. Step 6: Final answer
    x = 388,690.64

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