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Finding the Fourth Proportional to 512,230.67, 706,970.85 and 305,512.31

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Solution

The fourth proportional to 512,230.67, 706,970.85 and 305,512.31 is: 421,662.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,230.67 : 706,970.85 = 305,512.31 : x
  2. Step 2: Convert to fraction form
    512,230.67/706,970.85 = 305,512.31/x
  3. Step 3: Cross multiply
    512,230.67x = 706,970.85 × 305,512.31
  4. Step 4: Simplify right side
    512,230.67x = 215,988,298,107.92
  5. Step 5: Solve for x
    x = 215,988,298,107.92/512,230.67
  6. Step 6: Final answer
    x = 421,662.18

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