Finding the Fourth Proportional to 427,302.09, 640,751.18 and 127,678.05
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Solution
The fourth proportional to 427,302.09, 640,751.18 and 127,678.05 is: 191,456.73
Step by Step Solution
- Step 1: Write the proportion equation
427,302.09 : 640,751.18 = 127,678.05 : x - Step 2: Convert to fraction form
427,302.09/640,751.18 = 127,678.05/x - Step 3: Cross multiply
427,302.09x = 640,751.18 × 127,678.05 - Step 4: Simplify right side
427,302.09x = 81,809,860,559.21 - Step 5: Solve for x
x = 81,809,860,559.21/427,302.09 - Step 6: Final answer
x = 191,456.73
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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.