Home / 820,122.40-1,230,183.60-259,328.80

Finding the Fourth Proportional to 820,122.40, 1,230,183.60 and 259,328.80

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Solution

The fourth proportional to 820,122.40, 1,230,183.60 and 259,328.80 is: 388,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,122.40 : 1,230,183.60 = 259,328.80 : x
  2. Step 2: Convert to fraction form
    820,122.40/1,230,183.60 = 259,328.80/x
  3. Step 3: Cross multiply
    820,122.40x = 1,230,183.60 × 259,328.80
  4. Step 4: Simplify right side
    820,122.40x = 319,022,036,767.68
  5. Step 5: Solve for x
    x = 319,022,036,767.68/820,122.40
  6. Step 6: Final answer
    x = 388,993.20

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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.