Finding the Fourth Proportional to 312,795.68, 431,715.84 and 178,659.68
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Solution
The fourth proportional to 312,795.68, 431,715.84 and 178,659.68 is: 246,583.37
Step by Step Solution
- Step 1: Write the proportion equation
312,795.68 : 431,715.84 = 178,659.68 : x - Step 2: Convert to fraction form
312,795.68/431,715.84 = 178,659.68/x - Step 3: Cross multiply
312,795.68x = 431,715.84 × 178,659.68 - Step 4: Simplify right side
312,795.68x = 77,130,213,825.33 - Step 5: Solve for x
x = 77,130,213,825.33/312,795.68 - Step 6: Final answer
x = 246,583.37
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1.5x scale
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.