Finding the Fourth Proportional to 461.21, 635.79 and 378.19
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Solution
The fourth proportional to 461.21, 635.79 and 378.19 is: 521.34
Step by Step Solution
- Step 1: Write the proportion equation
461.21 : 635.79 = 378.19 : x - Step 2: Convert to fraction form
461.21/635.79 = 378.19/x - Step 3: Cross multiply
461.21x = 635.79 × 378.19 - Step 4: Simplify right side
461.21x = 240,446.24 - Step 5: Solve for x
x = 240,446.24/461.21 - Step 6: Final answer
x = 521.34
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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.