Finding the Fourth Proportional to 221.65, 305.93 and 137.68
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Solution
The fourth proportional to 221.65, 305.93 and 137.68 is: 190.03
Step by Step Solution
- Step 1: Write the proportion equation
221.65 : 305.93 = 137.68 : x - Step 2: Convert to fraction form
221.65/305.93 = 137.68/x - Step 3: Cross multiply
221.65x = 305.93 × 137.68 - Step 4: Simplify right side
221.65x = 42,120.97 - Step 5: Solve for x
x = 42,120.97/221.65 - Step 6: Final answer
x = 190.03
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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.