Finding the Fourth Proportional to 305.13, 421.21 and 194.75
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Solution
The fourth proportional to 305.13, 421.21 and 194.75 is: 268.84
Step by Step Solution
- Step 1: Write the proportion equation
305.13 : 421.21 = 194.75 : x - Step 2: Convert to fraction form
305.13/421.21 = 194.75/x - Step 3: Cross multiply
305.13x = 421.21 × 194.75 - Step 4: Simplify right side
305.13x = 82,030.36 - Step 5: Solve for x
x = 82,030.36/305.13 - Step 6: Final answer
x = 268.84
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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.