Finding the Fourth Proportional to 328,528.80, 492,428.70 and 128,782.80
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Solution
The fourth proportional to 328,528.80, 492,428.70 and 128,782.80 is: 193,031.32
Step by Step Solution
- Step 1: Write the proportion equation
328,528.80 : 492,428.70 = 128,782.80 : x - Step 2: Convert to fraction form
328,528.80/492,428.70 = 128,782.80/x - Step 3: Cross multiply
328,528.80x = 492,428.70 × 128,782.80 - Step 4: Simplify right side
328,528.80x = 63,416,346,786.36 - Step 5: Solve for x
x = 63,416,346,786.36/328,528.80 - Step 6: Final answer
x = 193,031.32
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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.