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Finding the Fourth Proportional to 538,306.19, 742,879.31 and 308,905.48

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Solution

The fourth proportional to 538,306.19, 742,879.31 and 308,905.48 is: 426,299.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,306.19 : 742,879.31 = 308,905.48 : x
  2. Step 2: Convert to fraction form
    538,306.19/742,879.31 = 308,905.48/x
  3. Step 3: Cross multiply
    538,306.19x = 742,879.31 × 308,905.48
  4. Step 4: Simplify right side
    538,306.19x = 229,479,486,435.89
  5. Step 5: Solve for x
    x = 229,479,486,435.89/538,306.19
  6. Step 6: Final answer
    x = 426,299.18

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