Finding the Fourth Proportional to 428,322.80, 642,122.76 and 270,202.88
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Solution
The fourth proportional to 428,322.80, 642,122.76 and 270,202.88 is: 405,076.31
Step by Step Solution
- Step 1: Write the proportion equation
428,322.80 : 642,122.76 = 270,202.88 : x - Step 2: Convert to fraction form
428,322.80/642,122.76 = 270,202.88/x - Step 3: Cross multiply
428,322.80x = 642,122.76 × 270,202.88 - Step 4: Simplify right side
428,322.80x = 173,503,419,065.55 - Step 5: Solve for x
x = 173,503,419,065.55/428,322.80 - Step 6: Final answer
x = 405,076.31
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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.