Finding the Fourth Proportional to 317.70, 476.40 and 122.70
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Solution
The fourth proportional to 317.70, 476.40 and 122.70 is: 183.99
Step by Step Solution
- Step 1: Write the proportion equation
317.70 : 476.40 = 122.70 : x - Step 2: Convert to fraction form
317.70/476.40 = 122.70/x - Step 3: Cross multiply
317.70x = 476.40 × 122.70 - Step 4: Simplify right side
317.70x = 58,454.28 - Step 5: Solve for x
x = 58,454.28/317.70 - Step 6: Final answer
x = 183.99
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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.