Finding the Fourth Proportional to 405,764.80, 608,128.80 and 311,804.80
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Solution
The fourth proportional to 405,764.80, 608,128.80 and 311,804.80 is: 467,308.84
Step by Step Solution
- Step 1: Write the proportion equation
405,764.80 : 608,128.80 = 311,804.80 : x - Step 2: Convert to fraction form
405,764.80/608,128.80 = 311,804.80/x - Step 3: Cross multiply
405,764.80x = 608,128.80 × 311,804.80 - Step 4: Simplify right side
405,764.80x = 189,617,478,858.24 - Step 5: Solve for x
x = 189,617,478,858.24/405,764.80 - Step 6: Final answer
x = 467,308.84
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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.