Finding the Fourth Proportional to 409,811.20, 614,716.80 and 129,356.80
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Solution
The fourth proportional to 409,811.20, 614,716.80 and 129,356.80 is: 194,035.20
Step by Step Solution
- Step 1: Write the proportion equation
409,811.20 : 614,716.80 = 129,356.80 : x - Step 2: Convert to fraction form
409,811.20/614,716.80 = 129,356.80/x - Step 3: Cross multiply
409,811.20x = 614,716.80 × 129,356.80 - Step 4: Simplify right side
409,811.20x = 79,517,798,154.24 - Step 5: Solve for x
x = 79,517,798,154.24/409,811.20 - Step 6: Final answer
x = 194,035.20
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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.