Finding the Fourth Proportional to 378.24, 521.97 and 253.70
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Solution
The fourth proportional to 378.24, 521.97 and 253.70 is: 350.10
Step by Step Solution
- Step 1: Write the proportion equation
378.24 : 521.97 = 253.70 : x - Step 2: Convert to fraction form
378.24/521.97 = 253.70/x - Step 3: Cross multiply
378.24x = 521.97 × 253.70 - Step 4: Simplify right side
378.24x = 132,421.18 - Step 5: Solve for x
x = 132,421.18/378.24 - Step 6: Final answer
x = 350.10
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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.