Finding the Fourth Proportional to 388,215,975.84, 582,329,112.12 and 129,431,279.04
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Solution
The fourth proportional to 388,215,975.84, 582,329,112.12 and 129,431,279.04 is: 194,148,635.02
Step by Step Solution
- Step 1: Write the proportion equation
388,215,975.84 : 582,329,112.12 = 129,431,279.04 : x - Step 2: Convert to fraction form
388,215,975.84/582,329,112.12 = 129,431,279.04/x - Step 3: Cross multiply
388,215,975.84x = 582,329,112.12 × 129,431,279.04 - Step 4: Simplify right side
388,215,975.84x = 75,371,601,803,919,168 - Step 5: Solve for x
x = 75,371,601,803,919,168/388,215,975.84 - Step 6: Final answer
x = 194,148,635.02
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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.