Finding the Fourth Proportional to 428,450.68, 638,845.49 and 416,680.12
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Solution
The fourth proportional to 428,450.68, 638,845.49 and 416,680.12 is: 621,294.88
Step by Step Solution
- Step 1: Write the proportion equation
428,450.68 : 638,845.49 = 416,680.12 : x - Step 2: Convert to fraction form
428,450.68/638,845.49 = 416,680.12/x - Step 3: Cross multiply
428,450.68x = 638,845.49 × 416,680.12 - Step 4: Simplify right side
428,450.68x = 266,194,215,434.66 - Step 5: Solve for x
x = 266,194,215,434.66/428,450.68 - Step 6: Final answer
x = 621,294.88
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.