Finding the Fourth Proportional to 306.99, 423.63 and 208.62
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Solution
The fourth proportional to 306.99, 423.63 and 208.62 is: 287.88
Step by Step Solution
- Step 1: Write the proportion equation
306.99 : 423.63 = 208.62 : x - Step 2: Convert to fraction form
306.99/423.63 = 208.62/x - Step 3: Cross multiply
306.99x = 423.63 × 208.62 - Step 4: Simplify right side
306.99x = 88,377.69 - Step 5: Solve for x
x = 88,377.69/306.99 - Step 6: Final answer
x = 287.88
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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.