Finding the Fourth Proportional to 415.68, 622.80 and 286.08
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Solution
The fourth proportional to 415.68, 622.80 and 286.08 is: 428.62
Step by Step Solution
- Step 1: Write the proportion equation
415.68 : 622.80 = 286.08 : x - Step 2: Convert to fraction form
415.68/622.80 = 286.08/x - Step 3: Cross multiply
415.68x = 622.80 × 286.08 - Step 4: Simplify right side
415.68x = 178,170.62 - Step 5: Solve for x
x = 178,170.62/415.68 - Step 6: Final answer
x = 428.62
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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.