Finding the Fourth Proportional to 427,991.91, 641,986.32 and 128,471.19
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Solution
The fourth proportional to 427,991.91, 641,986.32 and 128,471.19 is: 192,706.32
Step by Step Solution
- Step 1: Write the proportion equation
427,991.91 : 641,986.32 = 128,471.19 : x - Step 2: Convert to fraction form
427,991.91/641,986.32 = 128,471.19/x - Step 3: Cross multiply
427,991.91x = 641,986.32 × 128,471.19 - Step 4: Simplify right side
427,991.91x = 82,476,746,494.12 - Step 5: Solve for x
x = 82,476,746,494.12/427,991.91 - Step 6: Final answer
x = 192,706.32
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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.