Finding the Fourth Proportional to 391,183.20, 587,163.60 and 191,728.80
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Solution
The fourth proportional to 391,183.20, 587,163.60 and 191,728.80 is: 287,783.76
Step by Step Solution
- Step 1: Write the proportion equation
391,183.20 : 587,163.60 = 191,728.80 : x - Step 2: Convert to fraction form
391,183.20/587,163.60 = 191,728.80/x - Step 3: Cross multiply
391,183.20x = 587,163.60 × 191,728.80 - Step 4: Simplify right side
391,183.20x = 112,576,172,431.68 - Step 5: Solve for x
x = 112,576,172,431.68/391,183.20 - Step 6: Final answer
x = 287,783.76
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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.