Finding the Fourth Proportional to 408,771.56, 613,179.21 and 128,310.68
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Solution
The fourth proportional to 408,771.56, 613,179.21 and 128,310.68 is: 192,472.89
Step by Step Solution
- Step 1: Write the proportion equation
408,771.56 : 613,179.21 = 128,310.68 : x - Step 2: Convert to fraction form
408,771.56/613,179.21 = 128,310.68/x - Step 3: Cross multiply
408,771.56x = 613,179.21 × 128,310.68 - Step 4: Simplify right side
408,771.56x = 78,677,443,411.08 - Step 5: Solve for x
x = 78,677,443,411.08/408,771.56 - Step 6: Final answer
x = 192,472.89
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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.