Finding the Fourth Proportional to 378.19, 521.58 and 328.99
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Solution
The fourth proportional to 378.19, 521.58 and 328.99 is: 453.73
Step by Step Solution
- Step 1: Write the proportion equation
378.19 : 521.58 = 328.99 : x - Step 2: Convert to fraction form
378.19/521.58 = 328.99/x - Step 3: Cross multiply
378.19x = 521.58 × 328.99 - Step 4: Simplify right side
378.19x = 171,594.60 - Step 5: Solve for x
x = 171,594.60/378.19 - Step 6: Final answer
x = 453.73
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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.