Finding the Fourth Proportional to 858,129.20, 1,287,193.80 and 218,431.70
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Solution
The fourth proportional to 858,129.20, 1,287,193.80 and 218,431.70 is: 327,647.55
Step by Step Solution
- Step 1: Write the proportion equation
858,129.20 : 1,287,193.80 = 218,431.70 : x - Step 2: Convert to fraction form
858,129.20/1,287,193.80 = 218,431.70/x - Step 3: Cross multiply
858,129.20x = 1,287,193.80 × 218,431.70 - Step 4: Simplify right side
858,129.20x = 281,163,929,963.46 - Step 5: Solve for x
x = 281,163,929,963.46/858,129.20 - Step 6: Final answer
x = 327,647.55
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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.