Finding the Fourth Proportional to 318,949.40, 478,424.10 and 213,195.80
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Solution
The fourth proportional to 318,949.40, 478,424.10 and 213,195.80 is: 319,793.70
Step by Step Solution
- Step 1: Write the proportion equation
318,949.40 : 478,424.10 = 213,195.80 : x - Step 2: Convert to fraction form
318,949.40/478,424.10 = 213,195.80/x - Step 3: Cross multiply
318,949.40x = 478,424.10 × 213,195.80 - Step 4: Simplify right side
318,949.40x = 101,998,008,738.78 - Step 5: Solve for x
x = 101,998,008,738.78/318,949.40 - Step 6: Final answer
x = 319,793.70
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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.