Finding the Fourth Proportional to 305.09, 420.18 and 263.63
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Solution
The fourth proportional to 305.09, 420.18 and 263.63 is: 363.08
Step by Step Solution
- Step 1: Write the proportion equation
305.09 : 420.18 = 263.63 : x - Step 2: Convert to fraction form
305.09/420.18 = 263.63/x - Step 3: Cross multiply
305.09x = 420.18 × 263.63 - Step 4: Simplify right side
305.09x = 110,772.05 - Step 5: Solve for x
x = 110,772.05/305.09 - Step 6: Final answer
x = 363.08
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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.