Finding the Fourth Proportional to 319.99, 441.17 and 221.78
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Solution
The fourth proportional to 319.99, 441.17 and 221.78 is: 305.77
Step by Step Solution
- Step 1: Write the proportion equation
319.99 : 441.17 = 221.78 : x - Step 2: Convert to fraction form
319.99/441.17 = 221.78/x - Step 3: Cross multiply
319.99x = 441.17 × 221.78 - Step 4: Simplify right side
319.99x = 97,842.68 - Step 5: Solve for x
x = 97,842.68/319.99 - Step 6: Final answer
x = 305.77
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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.