Home / 1,821,680.80-2,728,147.20-978,373.60

Finding the Fourth Proportional to 1,821,680.80, 2,728,147.20 and 978,373.60

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Solution

The fourth proportional to 1,821,680.80, 2,728,147.20 and 978,373.60 is: 1,465,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821,680.80 : 2,728,147.20 = 978,373.60 : x
  2. Step 2: Convert to fraction form
    1,821,680.80/2,728,147.20 = 978,373.60/x
  3. Step 3: Cross multiply
    1,821,680.80x = 2,728,147.20 × 978,373.60
  4. Step 4: Simplify right side
    1,821,680.80x = 2,669,147,197,393.92
  5. Step 5: Solve for x
    x = 2,669,147,197,393.92/1,821,680.80
  6. Step 6: Final answer
    x = 1,465,211.25

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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.