Finding the Fourth Proportional to 311,978.59, 430,529.99 and 168,738.19
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Solution
The fourth proportional to 311,978.59, 430,529.99 and 168,738.19 is: 232,858.45
Step by Step Solution
- Step 1: Write the proportion equation
311,978.59 : 430,529.99 = 168,738.19 : x - Step 2: Convert to fraction form
311,978.59/430,529.99 = 168,738.19/x - Step 3: Cross multiply
311,978.59x = 430,529.99 × 168,738.19 - Step 4: Simplify right side
311,978.59x = 72,646,849,333.30 - Step 5: Solve for x
x = 72,646,849,333.30/311,978.59 - Step 6: Final answer
x = 232,858.45
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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.