Finding the Fourth Proportional to 428,924,805.09, 643,093,485.84 and 218,428,030.55
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Solution
The fourth proportional to 428,924,805.09, 643,093,485.84 and 218,428,030.55 is: 327,492,469.31
Step by Step Solution
- Step 1: Write the proportion equation
428,924,805.09 : 643,093,485.84 = 218,428,030.55 : x - Step 2: Convert to fraction form
428,924,805.09/643,093,485.84 = 218,428,030.55/x - Step 3: Cross multiply
428,924,805.09x = 643,093,485.84 × 218,428,030.55 - Step 4: Simplify right side
428,924,805.09x = 140,469,643,568,350,048 - Step 5: Solve for x
x = 140,469,643,568,350,048/428,924,805.09 - Step 6: Final answer
x = 327,492,469.31
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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.