Finding the Fourth Proportional to 396.19, 546.74 and 221.53
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Solution
The fourth proportional to 396.19, 546.74 and 221.53 is: 305.71
Step by Step Solution
- Step 1: Write the proportion equation
396.19 : 546.74 = 221.53 : x - Step 2: Convert to fraction form
396.19/546.74 = 221.53/x - Step 3: Cross multiply
396.19x = 546.74 × 221.53 - Step 4: Simplify right side
396.19x = 121,119.31 - Step 5: Solve for x
x = 121,119.31/396.19 - Step 6: Final answer
x = 305.71
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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.