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Finding the Fourth Proportional to 370,828.40, 511,679.75 and 209,679.89

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Solution

The fourth proportional to 370,828.40, 511,679.75 and 209,679.89 is: 289,322.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,828.40 : 511,679.75 = 209,679.89 : x
  2. Step 2: Convert to fraction form
    370,828.40/511,679.75 = 209,679.89/x
  3. Step 3: Cross multiply
    370,828.40x = 511,679.75 × 209,679.89
  4. Step 4: Simplify right side
    370,828.40x = 107,288,950,088.43
  5. Step 5: Solve for x
    x = 107,288,950,088.43/370,828.40
  6. Step 6: Final answer
    x = 289,322.37

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