Finding the Fourth Proportional to 317.80, 476.40 and 122.68
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Solution
The fourth proportional to 317.80, 476.40 and 122.68 is: 183.90
Step by Step Solution
- Step 1: Write the proportion equation
317.80 : 476.40 = 122.68 : x - Step 2: Convert to fraction form
317.80/476.40 = 122.68/x - Step 3: Cross multiply
317.80x = 476.40 × 122.68 - Step 4: Simplify right side
317.80x = 58,444.75 - Step 5: Solve for x
x = 58,444.75/317.80 - Step 6: Final answer
x = 183.90
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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.