Finding the Fourth Proportional to 279.24, 385.69 and 196.75
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Solution
The fourth proportional to 279.24, 385.69 and 196.75 is: 271.75
Step by Step Solution
- Step 1: Write the proportion equation
279.24 : 385.69 = 196.75 : x - Step 2: Convert to fraction form
279.24/385.69 = 196.75/x - Step 3: Cross multiply
279.24x = 385.69 × 196.75 - Step 4: Simplify right side
279.24x = 75,884.51 - Step 5: Solve for x
x = 75,884.51/279.24 - Step 6: Final answer
x = 271.75
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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.