Finding the Fourth Proportional to 640.81, 961.53 and 397.27
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Solution
The fourth proportional to 640.81, 961.53 and 397.27 is: 596.10
Step by Step Solution
- Step 1: Write the proportion equation
640.81 : 961.53 = 397.27 : x - Step 2: Convert to fraction form
640.81/961.53 = 397.27/x - Step 3: Cross multiply
640.81x = 961.53 × 397.27 - Step 4: Simplify right side
640.81x = 381,987.02 - Step 5: Solve for x
x = 381,987.02/640.81 - Step 6: Final answer
x = 596.10
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.