Finding the Fourth Proportional to 305.79, 458.15 and 218.99
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Solution
The fourth proportional to 305.79, 458.15 and 218.99 is: 328.09
Step by Step Solution
- Step 1: Write the proportion equation
305.79 : 458.15 = 218.99 : x - Step 2: Convert to fraction form
305.79/458.15 = 218.99/x - Step 3: Cross multiply
305.79x = 458.15 × 218.99 - Step 4: Simplify right side
305.79x = 100,326.88 - Step 5: Solve for x
x = 100,326.88/305.79 - Step 6: Final answer
x = 328.09
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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.