Finding the Fourth Proportional to 328,430.40, 492,775.20 and 128,716.80
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Solution
The fourth proportional to 328,430.40, 492,775.20 and 128,716.80 is: 193,125.99
Step by Step Solution
- Step 1: Write the proportion equation
328,430.40 : 492,775.20 = 128,716.80 : x - Step 2: Convert to fraction form
328,430.40/492,775.20 = 128,716.80/x - Step 3: Cross multiply
328,430.40x = 492,775.20 × 128,716.80 - Step 4: Simplify right side
328,430.40x = 63,428,446,863.36 - Step 5: Solve for x
x = 63,428,446,863.36/328,430.40 - Step 6: Final answer
x = 193,125.99
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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.