Finding the Fourth Proportional to 203.62, 280.68 and 129.80
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Solution
The fourth proportional to 203.62, 280.68 and 129.80 is: 178.92
Step by Step Solution
- Step 1: Write the proportion equation
203.62 : 280.68 = 129.80 : x - Step 2: Convert to fraction form
203.62/280.68 = 129.80/x - Step 3: Cross multiply
203.62x = 280.68 × 129.80 - Step 4: Simplify right side
203.62x = 36,432.26 - Step 5: Solve for x
x = 36,432.26/203.62 - Step 6: Final answer
x = 178.92
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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.