Finding the Fourth Proportional to 381.42, 571.74 and 218.79
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Solution
The fourth proportional to 381.42, 571.74 and 218.79 is: 327.96
Step by Step Solution
- Step 1: Write the proportion equation
381.42 : 571.74 = 218.79 : x - Step 2: Convert to fraction form
381.42/571.74 = 218.79/x - Step 3: Cross multiply
381.42x = 571.74 × 218.79 - Step 4: Simplify right side
381.42x = 125,090.99 - Step 5: Solve for x
x = 125,090.99/381.42 - Step 6: Final answer
x = 327.96
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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.