Finding the Fourth Proportional to 305.60, 421.26 and 239.99
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Solution
The fourth proportional to 305.60, 421.26 and 239.99 is: 330.81
Step by Step Solution
- Step 1: Write the proportion equation
305.60 : 421.26 = 239.99 : x - Step 2: Convert to fraction form
305.60/421.26 = 239.99/x - Step 3: Cross multiply
305.60x = 421.26 × 239.99 - Step 4: Simplify right side
305.60x = 101,095.18 - Step 5: Solve for x
x = 101,095.18/305.60 - Step 6: Final answer
x = 330.81
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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.