Home / 1,821,678.80-2,728,144.20-978,371.60

Finding the Fourth Proportional to 1,821,678.80, 2,728,144.20 and 978,371.60

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Solution

The fourth proportional to 1,821,678.80, 2,728,144.20 and 978,371.60 is: 1,465,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821,678.80 : 2,728,144.20 = 978,371.60 : x
  2. Step 2: Convert to fraction form
    1,821,678.80/2,728,144.20 = 978,371.60/x
  3. Step 3: Cross multiply
    1,821,678.80x = 2,728,144.20 × 978,371.60
  4. Step 4: Simplify right side
    1,821,678.80x = 2,669,138,805,984.72
  5. Step 5: Solve for x
    x = 2,669,138,805,984.72/1,821,678.80
  6. Step 6: Final answer
    x = 1,465,208.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.