Finding the Fourth Proportional to 221.12, 305.18 and 133.80
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Solution
The fourth proportional to 221.12, 305.18 and 133.80 is: 184.67
Step by Step Solution
- Step 1: Write the proportion equation
221.12 : 305.18 = 133.80 : x - Step 2: Convert to fraction form
221.12/305.18 = 133.80/x - Step 3: Cross multiply
221.12x = 305.18 × 133.80 - Step 4: Simplify right side
221.12x = 40,832.42 - Step 5: Solve for x
x = 40,832.42/221.12 - Step 6: Final answer
x = 184.67
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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.