Finding the Fourth Proportional to 207,912.60, 311,868.90 and 74,797.20
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Solution
The fourth proportional to 207,912.60, 311,868.90 and 74,797.20 is: 112,195.80
Step by Step Solution
- Step 1: Write the proportion equation
207,912.60 : 311,868.90 = 74,797.20 : x - Step 2: Convert to fraction form
207,912.60/311,868.90 = 74,797.20/x - Step 3: Cross multiply
207,912.60x = 311,868.90 × 74,797.20 - Step 4: Simplify right side
207,912.60x = 23,326,920,487.08 - Step 5: Solve for x
x = 23,326,920,487.08/207,912.60 - Step 6: Final answer
x = 112,195.80
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1.5x scale
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.