Finding the Fourth Proportional to 482.12, 665.15 and 305.09
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Solution
The fourth proportional to 482.12, 665.15 and 305.09 is: 420.92
Step by Step Solution
- Step 1: Write the proportion equation
482.12 : 665.15 = 305.09 : x - Step 2: Convert to fraction form
482.12/665.15 = 305.09/x - Step 3: Cross multiply
482.12x = 665.15 × 305.09 - Step 4: Simplify right side
482.12x = 202,930.75 - Step 5: Solve for x
x = 202,930.75/482.12 - Step 6: Final answer
x = 420.92
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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.