Finding the Fourth Proportional to 820,521.80, 1,230,782.70 and 378,153.80
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Solution
The fourth proportional to 820,521.80, 1,230,782.70 and 378,153.80 is: 567,230.70
Step by Step Solution
- Step 1: Write the proportion equation
820,521.80 : 1,230,782.70 = 378,153.80 : x - Step 2: Convert to fraction form
820,521.80/1,230,782.70 = 378,153.80/x - Step 3: Cross multiply
820,521.80x = 1,230,782.70 × 378,153.80 - Step 4: Simplify right side
820,521.80x = 465,425,154,979.26 - Step 5: Solve for x
x = 465,425,154,979.26/820,521.80 - Step 6: Final answer
x = 567,230.70
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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.