Finding the Fourth Proportional to 312,446.21, 431,175.11 and 169,205.81
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Solution
The fourth proportional to 312,446.21, 431,175.11 and 169,205.81 is: 233,503.65
Step by Step Solution
- Step 1: Write the proportion equation
312,446.21 : 431,175.11 = 169,205.81 : x - Step 2: Convert to fraction form
312,446.21/431,175.11 = 169,205.81/x - Step 3: Cross multiply
312,446.21x = 431,175.11 × 169,205.81 - Step 4: Simplify right side
312,446.21x = 72,957,330,737.48 - Step 5: Solve for x
x = 72,957,330,737.48/312,446.21 - Step 6: Final answer
x = 233,503.65
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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.