Finding the Fourth Proportional to 642,403.20, 963,604.80 and 327,475.20
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Solution
The fourth proportional to 642,403.20, 963,604.80 and 327,475.20 is: 491,212.80
Step by Step Solution
- Step 1: Write the proportion equation
642,403.20 : 963,604.80 = 327,475.20 : x - Step 2: Convert to fraction form
642,403.20/963,604.80 = 327,475.20/x - Step 3: Cross multiply
642,403.20x = 963,604.80 × 327,475.20 - Step 4: Simplify right side
642,403.20x = 315,556,674,600.96 - Step 5: Solve for x
x = 315,556,674,600.96/642,403.20 - Step 6: Final answer
x = 491,212.80
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Similar ratio
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1.5x scale
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.