Finding the Fourth Proportional to 305.44, 420.60 and 272.68
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Solution
The fourth proportional to 305.44, 420.60 and 272.68 is: 375.49
Step by Step Solution
- Step 1: Write the proportion equation
305.44 : 420.60 = 272.68 : x - Step 2: Convert to fraction form
305.44/420.60 = 272.68/x - Step 3: Cross multiply
305.44x = 420.60 × 272.68 - Step 4: Simplify right side
305.44x = 114,689.21 - Step 5: Solve for x
x = 114,689.21/305.44 - Step 6: Final answer
x = 375.49
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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.