Finding the Fourth Proportional to 218.84, 328.18 and 74.68
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Solution
The fourth proportional to 218.84, 328.18 and 74.68 is: 111.99
Step by Step Solution
- Step 1: Write the proportion equation
218.84 : 328.18 = 74.68 : x - Step 2: Convert to fraction form
218.84/328.18 = 74.68/x - Step 3: Cross multiply
218.84x = 328.18 × 74.68 - Step 4: Simplify right side
218.84x = 24,508.48 - Step 5: Solve for x
x = 24,508.48/218.84 - Step 6: Final answer
x = 111.99
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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.