Finding the Fourth Proportional to 312.11, 430.49 and 201.63
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Solution
The fourth proportional to 312.11, 430.49 and 201.63 is: 278.11
Step by Step Solution
- Step 1: Write the proportion equation
312.11 : 430.49 = 201.63 : x - Step 2: Convert to fraction form
312.11/430.49 = 201.63/x - Step 3: Cross multiply
312.11x = 430.49 × 201.63 - Step 4: Simplify right side
312.11x = 86,799.70 - Step 5: Solve for x
x = 86,799.70/312.11 - Step 6: Final answer
x = 278.11
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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.