Finding the Fourth Proportional to 312,438.09, 431,164.98 and 169,198.38
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Solution
The fourth proportional to 312,438.09, 431,164.98 and 169,198.38 is: 233,493.99
Step by Step Solution
- Step 1: Write the proportion equation
312,438.09 : 431,164.98 = 169,198.38 : x - Step 2: Convert to fraction form
312,438.09/431,164.98 = 169,198.38/x - Step 3: Cross multiply
312,438.09x = 431,164.98 × 169,198.38 - Step 4: Simplify right side
312,438.09x = 72,952,416,128.73 - Step 5: Solve for x
x = 72,952,416,128.73/312,438.09 - Step 6: Final answer
x = 233,493.99
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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.