Finding the Fourth Proportional to 390,640.62, 585,357.84 and 263,783.70
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Solution
The fourth proportional to 390,640.62, 585,357.84 and 263,783.70 is: 395,268.31
Step by Step Solution
- Step 1: Write the proportion equation
390,640.62 : 585,357.84 = 263,783.70 : x - Step 2: Convert to fraction form
390,640.62/585,357.84 = 263,783.70/x - Step 3: Cross multiply
390,640.62x = 585,357.84 × 263,783.70 - Step 4: Simplify right side
390,640.62x = 154,407,856,859.21 - Step 5: Solve for x
x = 154,407,856,859.21/390,640.62 - Step 6: Final answer
x = 395,268.31
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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.