Finding the Fourth Proportional to 419,345,659.84, 629,018,489.56 and 128,212,782.96
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Solution
The fourth proportional to 419,345,659.84, 629,018,489.56 and 128,212,782.96 is: 192,319,174.38
Step by Step Solution
- Step 1: Write the proportion equation
419,345,659.84 : 629,018,489.56 = 128,212,782.96 : x - Step 2: Convert to fraction form
419,345,659.84/629,018,489.56 = 128,212,782.96/x - Step 3: Cross multiply
419,345,659.84x = 629,018,489.56 × 128,212,782.96 - Step 4: Simplify right side
419,345,659.84x = 80,648,211,079,783,296 - Step 5: Solve for x
x = 80,648,211,079,783,296/419,345,659.84 - Step 6: Final answer
x = 192,319,174.38
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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.