Finding the Fourth Proportional to 640.58, 960.93 and 207.63
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Solution
The fourth proportional to 640.58, 960.93 and 207.63 is: 311.47
Step by Step Solution
- Step 1: Write the proportion equation
640.58 : 960.93 = 207.63 : x - Step 2: Convert to fraction form
640.58/960.93 = 207.63/x - Step 3: Cross multiply
640.58x = 960.93 × 207.63 - Step 4: Simplify right side
640.58x = 199,517.90 - Step 5: Solve for x
x = 199,517.90/640.58 - Step 6: Final answer
x = 311.47
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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.