Finding the Fourth Proportional to 415.32, 622.76 and 126.68
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Solution
The fourth proportional to 415.32, 622.76 and 126.68 is: 189.95
Step by Step Solution
- Step 1: Write the proportion equation
415.32 : 622.76 = 126.68 : x - Step 2: Convert to fraction form
415.32/622.76 = 126.68/x - Step 3: Cross multiply
415.32x = 622.76 × 126.68 - Step 4: Simplify right side
415.32x = 78,891.24 - Step 5: Solve for x
x = 78,891.24/415.32 - Step 6: Final answer
x = 189.95
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.