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Finding the Fourth Proportional to 978,388.80, 1,467,583.20 and 446,947.80

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Solution

The fourth proportional to 978,388.80, 1,467,583.20 and 446,947.80 is: 670,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,388.80 : 1,467,583.20 = 446,947.80 : x
  2. Step 2: Convert to fraction form
    978,388.80/1,467,583.20 = 446,947.80/x
  3. Step 3: Cross multiply
    978,388.80x = 1,467,583.20 × 446,947.80
  4. Step 4: Simplify right side
    978,388.80x = 655,933,082,556.96
  5. Step 5: Solve for x
    x = 655,933,082,556.96/978,388.80
  6. Step 6: Final answer
    x = 670,421.70

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