Finding the Fourth Proportional to 221.68, 332.48 and 84.70
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Solution
The fourth proportional to 221.68, 332.48 and 84.70 is: 127.03
Step by Step Solution
- Step 1: Write the proportion equation
221.68 : 332.48 = 84.70 : x - Step 2: Convert to fraction form
221.68/332.48 = 84.70/x - Step 3: Cross multiply
221.68x = 332.48 × 84.70 - Step 4: Simplify right side
221.68x = 28,160.12 - Step 5: Solve for x
x = 28,160.12/221.68 - Step 6: Final answer
x = 127.03
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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.