Finding the Fourth Proportional to 317.79, 476.54 and 135.09
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Solution
The fourth proportional to 317.79, 476.54 and 135.09 is: 202.57
Step by Step Solution
- Step 1: Write the proportion equation
317.79 : 476.54 = 135.09 : x - Step 2: Convert to fraction form
317.79/476.54 = 135.09/x - Step 3: Cross multiply
317.79x = 476.54 × 135.09 - Step 4: Simplify right side
317.79x = 64,375.11 - Step 5: Solve for x
x = 64,375.11/317.79 - Step 6: Final answer
x = 202.57
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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.