Finding the Fourth Proportional to 455,430.20, 683,145.30 and 218,715.80
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Solution
The fourth proportional to 455,430.20, 683,145.30 and 218,715.80 is: 328,073.70
Step by Step Solution
- Step 1: Write the proportion equation
455,430.20 : 683,145.30 = 218,715.80 : x - Step 2: Convert to fraction form
455,430.20/683,145.30 = 218,715.80/x - Step 3: Cross multiply
455,430.20x = 683,145.30 × 218,715.80 - Step 4: Simplify right side
455,430.20x = 149,414,670,805.74 - Step 5: Solve for x
x = 149,414,670,805.74/455,430.20 - Step 6: Final answer
x = 328,073.70
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Similar ratio
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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.