Finding the Fourth Proportional to 343,857.20, 515,785.80 and 91,137.20
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Solution
The fourth proportional to 343,857.20, 515,785.80 and 91,137.20 is: 136,705.80
Step by Step Solution
- Step 1: Write the proportion equation
343,857.20 : 515,785.80 = 91,137.20 : x - Step 2: Convert to fraction form
343,857.20/515,785.80 = 91,137.20/x - Step 3: Cross multiply
343,857.20x = 515,785.80 × 91,137.20 - Step 4: Simplify right side
343,857.20x = 47,007,273,611.76 - Step 5: Solve for x
x = 47,007,273,611.76/343,857.20 - Step 6: Final answer
x = 136,705.80
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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.