Finding the Fourth Proportional to 385,988,330.88, 532,668,011.02 and 209,776,338.99
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Solution
The fourth proportional to 385,988,330.88, 532,668,011.02 and 209,776,338.99 is: 289,493,583.90
Step by Step Solution
- Step 1: Write the proportion equation
385,988,330.88 : 532,668,011.02 = 209,776,338.99 : x - Step 2: Convert to fraction form
385,988,330.88/532,668,011.02 = 209,776,338.99/x - Step 3: Cross multiply
385,988,330.88x = 532,668,011.02 × 209,776,338.99 - Step 4: Simplify right side
385,988,330.88x = 111,741,145,248,336,144 - Step 5: Solve for x
x = 111,741,145,248,336,144/385,988,330.88 - Step 6: Final answer
x = 289,493,583.90
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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.