Finding the Fourth Proportional to 395,989.20, 593,765.10 and 129,612.60
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Solution
The fourth proportional to 395,989.20, 593,765.10 and 129,612.60 is: 194,347.32
Step by Step Solution
- Step 1: Write the proportion equation
395,989.20 : 593,765.10 = 129,612.60 : x - Step 2: Convert to fraction form
395,989.20/593,765.10 = 129,612.60/x - Step 3: Cross multiply
395,989.20x = 593,765.10 × 129,612.60 - Step 4: Simplify right side
395,989.20x = 76,959,438,400.26 - Step 5: Solve for x
x = 76,959,438,400.26/395,989.20 - Step 6: Final answer
x = 194,347.32
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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.