Finding the Fourth Proportional to 515,768.21, 711,871.54 and 393,578.09
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Solution
The fourth proportional to 515,768.21, 711,871.54 and 393,578.09 is: 543,222.78
Step by Step Solution
- Step 1: Write the proportion equation
515,768.21 : 711,871.54 = 393,578.09 : x - Step 2: Convert to fraction form
515,768.21/711,871.54 = 393,578.09/x - Step 3: Cross multiply
515,768.21x = 711,871.54 × 393,578.09 - Step 4: Simplify right side
515,768.21x = 280,177,039,164.77 - Step 5: Solve for x
x = 280,177,039,164.77/515,768.21 - Step 6: Final answer
x = 543,222.78
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.