Finding the Fourth Proportional to 317.05, 475.19 and 143.80
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Solution
The fourth proportional to 317.05, 475.19 and 143.80 is: 215.53
Step by Step Solution
- Step 1: Write the proportion equation
317.05 : 475.19 = 143.80 : x - Step 2: Convert to fraction form
317.05/475.19 = 143.80/x - Step 3: Cross multiply
317.05x = 475.19 × 143.80 - Step 4: Simplify right side
317.05x = 68,332.68 - Step 5: Solve for x
x = 68,332.68/317.05 - Step 6: Final answer
x = 215.53
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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.