Finding the Fourth Proportional to 429,243.63, 643,879.17 and 215,895.09
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Solution
The fourth proportional to 429,243.63, 643,879.17 and 215,895.09 is: 323,849.54
Step by Step Solution
- Step 1: Write the proportion equation
429,243.63 : 643,879.17 = 215,895.09 : x - Step 2: Convert to fraction form
429,243.63/643,879.17 = 215,895.09/x - Step 3: Cross multiply
429,243.63x = 643,879.17 × 215,895.09 - Step 4: Simplify right side
429,243.63x = 139,010,351,356.28 - Step 5: Solve for x
x = 139,010,351,356.28/429,243.63 - Step 6: Final answer
x = 323,849.54
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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.