Finding the Fourth Proportional to 408,661.20, 612,948.60 and 128,163.60
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Solution
The fourth proportional to 408,661.20, 612,948.60 and 128,163.60 is: 192,231.85
Step by Step Solution
- Step 1: Write the proportion equation
408,661.20 : 612,948.60 = 128,163.60 : x - Step 2: Convert to fraction form
408,661.20/612,948.60 = 128,163.60/x - Step 3: Cross multiply
408,661.20x = 612,948.60 × 128,163.60 - Step 4: Simplify right side
408,661.20x = 78,557,699,190.96 - Step 5: Solve for x
x = 78,557,699,190.96/408,661.20 - Step 6: Final answer
x = 192,231.85
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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.