Finding the Fourth Proportional to 207,718.10, 311,577.15 and 128,575.70
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Solution
The fourth proportional to 207,718.10, 311,577.15 and 128,575.70 is: 192,863.55
Step by Step Solution
- Step 1: Write the proportion equation
207,718.10 : 311,577.15 = 128,575.70 : x - Step 2: Convert to fraction form
207,718.10/311,577.15 = 128,575.70/x - Step 3: Cross multiply
207,718.10x = 311,577.15 × 128,575.70 - Step 4: Simplify right side
207,718.10x = 40,061,250,165.26 - Step 5: Solve for x
x = 40,061,250,165.26/207,718.10 - Step 6: Final answer
x = 192,863.55
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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.