Finding the Fourth Proportional to 378.18, 520.95 and 328.97
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Solution
The fourth proportional to 378.18, 520.95 and 328.97 is: 453.17
Step by Step Solution
- Step 1: Write the proportion equation
378.18 : 520.95 = 328.97 : x - Step 2: Convert to fraction form
378.18/520.95 = 328.97/x - Step 3: Cross multiply
378.18x = 520.95 × 328.97 - Step 4: Simplify right side
378.18x = 171,378.22 - Step 5: Solve for x
x = 171,378.22/378.18 - Step 6: Final answer
x = 453.17
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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.