Finding the Fourth Proportional to 428,193.31, 642,304.55 and 203,437.75
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Solution
The fourth proportional to 428,193.31, 642,304.55 and 203,437.75 is: 305,163.55
Step by Step Solution
- Step 1: Write the proportion equation
428,193.31 : 642,304.55 = 203,437.75 : x - Step 2: Convert to fraction form
428,193.31/642,304.55 = 203,437.75/x - Step 3: Cross multiply
428,193.31x = 642,304.55 × 203,437.75 - Step 4: Simplify right side
428,193.31x = 130,668,988,238.05 - Step 5: Solve for x
x = 130,668,988,238.05/428,193.31 - Step 6: Final answer
x = 305,163.55
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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.