Finding the Fourth Proportional to 464.43, 640.99 and 285.09
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Solution
The fourth proportional to 464.43, 640.99 and 285.09 is: 393.47
Step by Step Solution
- Step 1: Write the proportion equation
464.43 : 640.99 = 285.09 : x - Step 2: Convert to fraction form
464.43/640.99 = 285.09/x - Step 3: Cross multiply
464.43x = 640.99 × 285.09 - Step 4: Simplify right side
464.43x = 182,739.84 - Step 5: Solve for x
x = 182,739.84/464.43 - Step 6: Final answer
x = 393.47
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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.