Finding the Fourth Proportional to 515,642,467.88, 711,586,682.44 and 280,694,911.98
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Solution
The fourth proportional to 515,642,467.88, 711,586,682.44 and 280,694,911.98 is: 387,359,020.32
Step by Step Solution
- Step 1: Write the proportion equation
515,642,467.88 : 711,586,682.44 = 280,694,911.98 : x - Step 2: Convert to fraction form
515,642,467.88/711,586,682.44 = 280,694,911.98/x - Step 3: Cross multiply
515,642,467.88x = 711,586,682.44 × 280,694,911.98 - Step 4: Simplify right side
515,642,467.88x = 199,738,761,193,636,032 - Step 5: Solve for x
x = 199,738,761,193,636,032/515,642,467.88 - Step 6: Final answer
x = 387,359,020.32
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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.