Finding the Fourth Proportional to 674,678.40, 931,485.60 and 420,403.20
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Solution
The fourth proportional to 674,678.40, 931,485.60 and 420,403.20 is: 580,423.99
Step by Step Solution
- Step 1: Write the proportion equation
674,678.40 : 931,485.60 = 420,403.20 : x - Step 2: Convert to fraction form
674,678.40/931,485.60 = 420,403.20/x - Step 3: Cross multiply
674,678.40x = 931,485.60 × 420,403.20 - Step 4: Simplify right side
674,678.40x = 391,599,526,993.92 - Step 5: Solve for x
x = 391,599,526,993.92/674,678.40 - Step 6: Final answer
x = 580,423.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.