Finding the Fourth Proportional to 306.08, 421.56 and 305.18
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Solution
The fourth proportional to 306.08, 421.56 and 305.18 is: 420.32
Step by Step Solution
- Step 1: Write the proportion equation
306.08 : 421.56 = 305.18 : x - Step 2: Convert to fraction form
306.08/421.56 = 305.18/x - Step 3: Cross multiply
306.08x = 421.56 × 305.18 - Step 4: Simplify right side
306.08x = 128,651.68 - Step 5: Solve for x
x = 128,651.68/306.08 - Step 6: Final answer
x = 420.32
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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.