Finding the Fourth Proportional to 305.64, 421.62 and 189.28
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Solution
The fourth proportional to 305.64, 421.62 and 189.28 is: 261.11
Step by Step Solution
- Step 1: Write the proportion equation
305.64 : 421.62 = 189.28 : x - Step 2: Convert to fraction form
305.64/421.62 = 189.28/x - Step 3: Cross multiply
305.64x = 421.62 × 189.28 - Step 4: Simplify right side
305.64x = 79,804.23 - Step 5: Solve for x
x = 79,804.23/305.64 - Step 6: Final answer
x = 261.11
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.