Finding the Fourth Proportional to 207,922.10, 311,883.15 and 128,779.70
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Solution
The fourth proportional to 207,922.10, 311,883.15 and 128,779.70 is: 193,169.55
Step by Step Solution
- Step 1: Write the proportion equation
207,922.10 : 311,883.15 = 128,779.70 : x - Step 2: Convert to fraction form
207,922.10/311,883.15 = 128,779.70/x - Step 3: Cross multiply
207,922.10x = 311,883.15 × 128,779.70 - Step 4: Simplify right side
207,922.10x = 40,164,218,492.06 - Step 5: Solve for x
x = 40,164,218,492.06/207,922.10 - Step 6: Final answer
x = 193,169.55
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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.