Finding the Fourth Proportional to 427,982.91, 641,972.82 and 128,462.19
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Solution
The fourth proportional to 427,982.91, 641,972.82 and 128,462.19 is: 192,692.82
Step by Step Solution
- Step 1: Write the proportion equation
427,982.91 : 641,972.82 = 128,462.19 : x - Step 2: Convert to fraction form
427,982.91/641,972.82 = 128,462.19/x - Step 3: Cross multiply
427,982.91x = 641,972.82 × 128,462.19 - Step 4: Simplify right side
427,982.91x = 82,469,234,377.68 - Step 5: Solve for x
x = 82,469,234,377.68/427,982.91 - Step 6: Final answer
x = 192,692.82
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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.