Finding the Fourth Proportional to 639,193.40, 957,623.70 and 389,583.80
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Solution
The fourth proportional to 639,193.40, 957,623.70 and 389,583.80 is: 583,664.79
Step by Step Solution
- Step 1: Write the proportion equation
639,193.40 : 957,623.70 = 389,583.80 : x - Step 2: Convert to fraction form
639,193.40/957,623.70 = 389,583.80/x - Step 3: Cross multiply
639,193.40x = 957,623.70 × 389,583.80 - Step 4: Simplify right side
639,193.40x = 373,074,680,016.06 - Step 5: Solve for x
x = 373,074,680,016.06/639,193.40 - Step 6: Final answer
x = 583,664.79
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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.