Finding the Fourth Proportional to 305.40, 456.99 and 213.90
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Solution
The fourth proportional to 305.40, 456.99 and 213.90 is: 320.07
Step by Step Solution
- Step 1: Write the proportion equation
305.40 : 456.99 = 213.90 : x - Step 2: Convert to fraction form
305.40/456.99 = 213.90/x - Step 3: Cross multiply
305.40x = 456.99 × 213.90 - Step 4: Simplify right side
305.40x = 97,750.16 - Step 5: Solve for x
x = 97,750.16/305.40 - Step 6: Final answer
x = 320.07
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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.