Finding the Fourth Proportional to 639,405.12, 958,809.60 and 189,960.96
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Solution
The fourth proportional to 639,405.12, 958,809.60 and 189,960.96 is: 284,852.88
Step by Step Solution
- Step 1: Write the proportion equation
639,405.12 : 958,809.60 = 189,960.96 : x - Step 2: Convert to fraction form
639,405.12/958,809.60 = 189,960.96/x - Step 3: Cross multiply
639,405.12x = 958,809.60 × 189,960.96 - Step 4: Simplify right side
639,405.12x = 182,136,392,073.22 - Step 5: Solve for x
x = 182,136,392,073.22/639,405.12 - Step 6: Final answer
x = 284,852.88
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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.