Finding the Fourth Proportional to 207.20, 310.64 and 155.68
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Solution
The fourth proportional to 207.20, 310.64 and 155.68 is: 233.40
Step by Step Solution
- Step 1: Write the proportion equation
207.20 : 310.64 = 155.68 : x - Step 2: Convert to fraction form
207.20/310.64 = 155.68/x - Step 3: Cross multiply
207.20x = 310.64 × 155.68 - Step 4: Simplify right side
207.20x = 48,360.44 - Step 5: Solve for x
x = 48,360.44/207.20 - Step 6: Final answer
x = 233.40
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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.