Finding the Fourth Proportional to 207,928.80, 311,893.20 and 74,959.20
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Solution
The fourth proportional to 207,928.80, 311,893.20 and 74,959.20 is: 112,438.80
Step by Step Solution
- Step 1: Write the proportion equation
207,928.80 : 311,893.20 = 74,959.20 : x - Step 2: Convert to fraction form
207,928.80/311,893.20 = 74,959.20/x - Step 3: Cross multiply
207,928.80x = 311,893.20 × 74,959.20 - Step 4: Simplify right side
207,928.80x = 23,379,264,757.44 - Step 5: Solve for x
x = 23,379,264,757.44/207,928.80 - Step 6: Final answer
x = 112,438.80
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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.