Finding the Fourth Proportional to 813,915.76, 1,220,479.68 and 281,249.92
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Solution
The fourth proportional to 813,915.76, 1,220,479.68 and 281,249.92 is: 421,738.75
Step by Step Solution
- Step 1: Write the proportion equation
813,915.76 : 1,220,479.68 = 281,249.92 : x - Step 2: Convert to fraction form
813,915.76/1,220,479.68 = 281,249.92/x - Step 3: Cross multiply
813,915.76x = 1,220,479.68 × 281,249.92 - Step 4: Simplify right side
813,915.76x = 343,259,812,361.63 - Step 5: Solve for x
x = 343,259,812,361.63/813,915.76 - Step 6: Final answer
x = 421,738.75
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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.