Finding the Fourth Proportional to 394,638.99, 543,857.76 and 285,558.72
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Solution
The fourth proportional to 394,638.99, 543,857.76 and 285,558.72 is: 393,532.65
Step by Step Solution
- Step 1: Write the proportion equation
394,638.99 : 543,857.76 = 285,558.72 : x - Step 2: Convert to fraction form
394,638.99/543,857.76 = 285,558.72/x - Step 3: Cross multiply
394,638.99x = 543,857.76 × 285,558.72 - Step 4: Simplify right side
394,638.99x = 155,303,325,807.67 - Step 5: Solve for x
x = 155,303,325,807.67/394,638.99 - Step 6: Final answer
x = 393,532.65
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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.