Finding the Fourth Proportional to 415,129.40, 622,694.10 and 378,387.80
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Solution
The fourth proportional to 415,129.40, 622,694.10 and 378,387.80 is: 567,581.70
Step by Step Solution
- Step 1: Write the proportion equation
415,129.40 : 622,694.10 = 378,387.80 : x - Step 2: Convert to fraction form
415,129.40/622,694.10 = 378,387.80/x - Step 3: Cross multiply
415,129.40x = 622,694.10 × 378,387.80 - Step 4: Simplify right side
415,129.40x = 235,619,850,571.98 - Step 5: Solve for x
x = 235,619,850,571.98/415,129.40 - Step 6: Final answer
x = 567,581.70
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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.