Finding the Fourth Proportional to 378,990.36, 523,003.32 and 209,220.84
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Solution
The fourth proportional to 378,990.36, 523,003.32 and 209,220.84 is: 288,722.90
Step by Step Solution
- Step 1: Write the proportion equation
378,990.36 : 523,003.32 = 209,220.84 : x - Step 2: Convert to fraction form
378,990.36/523,003.32 = 209,220.84/x - Step 3: Cross multiply
378,990.36x = 523,003.32 × 209,220.84 - Step 4: Simplify right side
378,990.36x = 109,423,193,933.19 - Step 5: Solve for x
x = 109,423,193,933.19/378,990.36 - Step 6: Final answer
x = 288,722.90
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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.