Finding the Fourth Proportional to 420,959.40, 631,439.10 and 252,997.80
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Solution
The fourth proportional to 420,959.40, 631,439.10 and 252,997.80 is: 379,496.70
Step by Step Solution
- Step 1: Write the proportion equation
420,959.40 : 631,439.10 = 252,997.80 : x - Step 2: Convert to fraction form
420,959.40/631,439.10 = 252,997.80/x - Step 3: Cross multiply
420,959.40x = 631,439.10 × 252,997.80 - Step 4: Simplify right side
420,959.40x = 159,752,703,133.98 - Step 5: Solve for x
x = 159,752,703,133.98/420,959.40 - Step 6: Final answer
x = 379,496.70
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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.