Finding the Fourth Proportional to 222.75, 307.50 and 139.80
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Solution
The fourth proportional to 222.75, 307.50 and 139.80 is: 192.99
Step by Step Solution
- Step 1: Write the proportion equation
222.75 : 307.50 = 139.80 : x - Step 2: Convert to fraction form
222.75/307.50 = 139.80/x - Step 3: Cross multiply
222.75x = 307.50 × 139.80 - Step 4: Simplify right side
222.75x = 42,988.50 - Step 5: Solve for x
x = 42,988.50/222.75 - Step 6: Final answer
x = 192.99
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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.