Finding the Fourth Proportional to 221.23, 331.99 and 76.95
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Solution
The fourth proportional to 221.23, 331.99 and 76.95 is: 115.47
Step by Step Solution
- Step 1: Write the proportion equation
221.23 : 331.99 = 76.95 : x - Step 2: Convert to fraction form
221.23/331.99 = 76.95/x - Step 3: Cross multiply
221.23x = 331.99 × 76.95 - Step 4: Simplify right side
221.23x = 25,545.24 - Step 5: Solve for x
x = 25,545.24/221.23 - Step 6: Final answer
x = 115.47
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.