Finding the Fourth Proportional to 431,278,578.88, 646,680,958.56 and 212,447,423.68
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Solution
The fourth proportional to 431,278,578.88, 646,680,958.56 and 212,447,423.68 is: 318,554,433.99
Step by Step Solution
- Step 1: Write the proportion equation
431,278,578.88 : 646,680,958.56 = 212,447,423.68 : x - Step 2: Convert to fraction form
431,278,578.88/646,680,958.56 = 212,447,423.68/x - Step 3: Cross multiply
431,278,578.88x = 646,680,958.56 × 212,447,423.68 - Step 4: Simplify right side
431,278,578.88x = 137,385,703,588,984,832 - Step 5: Solve for x
x = 137,385,703,588,984,832/431,278,578.88 - Step 6: Final answer
x = 318,554,433.99
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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.