Finding the Fourth Proportional to 328.99, 491.49 and 212.49
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Solution
The fourth proportional to 328.99, 491.49 and 212.49 is: 317.44
Step by Step Solution
- Step 1: Write the proportion equation
328.99 : 491.49 = 212.49 : x - Step 2: Convert to fraction form
328.99/491.49 = 212.49/x - Step 3: Cross multiply
328.99x = 491.49 × 212.49 - Step 4: Simplify right side
328.99x = 104,434.25 - Step 5: Solve for x
x = 104,434.25/328.99 - Step 6: Final answer
x = 317.44
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.