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Finding the Fourth Proportional to 1,978,623.30, 2,967,934.95 and 780,147.30

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Solution

The fourth proportional to 1,978,623.30, 2,967,934.95 and 780,147.30 is: 1,170,220.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,623.30 : 2,967,934.95 = 780,147.30 : x
  2. Step 2: Convert to fraction form
    1,978,623.30/2,967,934.95 = 780,147.30/x
  3. Step 3: Cross multiply
    1,978,623.30x = 2,967,934.95 × 780,147.30
  4. Step 4: Simplify right side
    1,978,623.30x = 2,315,426,437,818.14
  5. Step 5: Solve for x
    x = 2,315,426,437,818.14/1,978,623.30
  6. Step 6: Final answer
    x = 1,170,220.95

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Why These Related Problems?

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