Finding the Fourth Proportional to 305.19, 421.15 and 187.19
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Solution
The fourth proportional to 305.19, 421.15 and 187.19 is: 258.31
Step by Step Solution
- Step 1: Write the proportion equation
305.19 : 421.15 = 187.19 : x - Step 2: Convert to fraction form
305.19/421.15 = 187.19/x - Step 3: Cross multiply
305.19x = 421.15 × 187.19 - Step 4: Simplify right side
305.19x = 78,833.24 - Step 5: Solve for x
x = 78,833.24/305.19 - Step 6: Final answer
x = 258.31
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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.