Finding the Fourth Proportional to 413,998.80, 620,998.20 and 394,315.80
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Solution
The fourth proportional to 413,998.80, 620,998.20 and 394,315.80 is: 591,473.70
Step by Step Solution
- Step 1: Write the proportion equation
413,998.80 : 620,998.20 = 394,315.80 : x - Step 2: Convert to fraction form
413,998.80/620,998.20 = 394,315.80/x - Step 3: Cross multiply
413,998.80x = 620,998.20 × 394,315.80 - Step 4: Simplify right side
413,998.80x = 244,869,402,031.56 - Step 5: Solve for x
x = 244,869,402,031.56/413,998.80 - Step 6: Final answer
x = 591,473.70
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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.