Finding the Fourth Proportional to 667,734,783.81, 921,471,049.80 and 381,621,536.73
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Solution
The fourth proportional to 667,734,783.81, 921,471,049.80 and 381,621,536.73 is: 526,636,033.65
Step by Step Solution
- Step 1: Write the proportion equation
667,734,783.81 : 921,471,049.80 = 381,621,536.73 : x - Step 2: Convert to fraction form
667,734,783.81/921,471,049.80 = 381,621,536.73/x - Step 3: Cross multiply
667,734,783.81x = 921,471,049.80 × 381,621,536.73 - Step 4: Simplify right side
667,734,783.81x = 351,653,198,076,882,368 - Step 5: Solve for x
x = 351,653,198,076,882,368/667,734,783.81 - Step 6: Final answer
x = 526,636,033.65
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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.