Finding the Fourth Proportional to 394,192,643.22, 543,989,372.34 and 217,992,493.98
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Solution
The fourth proportional to 394,192,643.22, 543,989,372.34 and 217,992,493.98 is: 300,831,590.88
Step by Step Solution
- Step 1: Write the proportion equation
394,192,643.22 : 543,989,372.34 = 217,992,493.98 : x - Step 2: Convert to fraction form
394,192,643.22/543,989,372.34 = 217,992,493.98/x - Step 3: Cross multiply
394,192,643.22x = 543,989,372.34 × 217,992,493.98 - Step 4: Simplify right side
394,192,643.22x = 118,585,599,975,011,424 - Step 5: Solve for x
x = 118,585,599,975,011,424/394,192,643.22 - Step 6: Final answer
x = 300,831,590.88
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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.