Finding the Fourth Proportional to 207.24, 310.79 and 139.14
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Solution
The fourth proportional to 207.24, 310.79 and 139.14 is: 208.66
Step by Step Solution
- Step 1: Write the proportion equation
207.24 : 310.79 = 139.14 : x - Step 2: Convert to fraction form
207.24/310.79 = 139.14/x - Step 3: Cross multiply
207.24x = 310.79 × 139.14 - Step 4: Simplify right side
207.24x = 43,242.62 - Step 5: Solve for x
x = 43,242.62/207.24 - Step 6: Final answer
x = 208.66
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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.