Finding the Fourth Proportional to 561.92, 838.84 and 489
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Solution
The fourth proportional to 561.92, 838.84 and 489 is: 729.98
Step by Step Solution
- Step 1: Write the proportion equation
561.92 : 838.84 = 489 : x - Step 2: Convert to fraction form
561.92/838.84 = 489/x - Step 3: Cross multiply
561.92x = 838.84 × 489 - Step 4: Simplify right side
561.92x = 410,192.76 - Step 5: Solve for x
x = 410,192.76/561.92 - Step 6: Final answer
x = 729.98
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.