Finding the Fourth Proportional to 258.46, 387.08 and 203.99
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Solution
The fourth proportional to 258.46, 387.08 and 203.99 is: 305.50
Step by Step Solution
- Step 1: Write the proportion equation
258.46 : 387.08 = 203.99 : x - Step 2: Convert to fraction form
258.46/387.08 = 203.99/x - Step 3: Cross multiply
258.46x = 387.08 × 203.99 - Step 4: Simplify right side
258.46x = 78,958.26 - Step 5: Solve for x
x = 78,958.26/258.46 - Step 6: Final answer
x = 305.50
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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.