Finding the Fourth Proportional to 870,990.21, 1,201,935.51 and 489,033.09
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Solution
The fourth proportional to 870,990.21, 1,201,935.51 and 489,033.09 is: 674,848.27
Step by Step Solution
- Step 1: Write the proportion equation
870,990.21 : 1,201,935.51 = 489,033.09 : x - Step 2: Convert to fraction form
870,990.21/1,201,935.51 = 489,033.09/x - Step 3: Cross multiply
870,990.21x = 1,201,935.51 × 489,033.09 - Step 4: Simplify right side
870,990.21x = 587,786,236,436.03 - Step 5: Solve for x
x = 587,786,236,436.03/870,990.21 - Step 6: Final answer
x = 674,848.27
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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.