Finding the Fourth Proportional to 428,855.80, 643,283.70 and 192,659.80
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Solution
The fourth proportional to 428,855.80, 643,283.70 and 192,659.80 is: 288,989.70
Step by Step Solution
- Step 1: Write the proportion equation
428,855.80 : 643,283.70 = 192,659.80 : x - Step 2: Convert to fraction form
428,855.80/643,283.70 = 192,659.80/x - Step 3: Cross multiply
428,855.80x = 643,283.70 × 192,659.80 - Step 4: Simplify right side
428,855.80x = 123,934,908,985.26 - Step 5: Solve for x
x = 123,934,908,985.26/428,855.80 - Step 6: Final answer
x = 288,989.70
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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.