Finding the Fourth Proportional to 424,149.80, 636,224.70 and 128,661.80
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Solution
The fourth proportional to 424,149.80, 636,224.70 and 128,661.80 is: 192,992.70
Step by Step Solution
- Step 1: Write the proportion equation
424,149.80 : 636,224.70 = 128,661.80 : x - Step 2: Convert to fraction form
424,149.80/636,224.70 = 128,661.80/x - Step 3: Cross multiply
424,149.80x = 636,224.70 × 128,661.80 - Step 4: Simplify right side
424,149.80x = 81,857,815,106.46 - Step 5: Solve for x
x = 81,857,815,106.46/424,149.80 - Step 6: Final answer
x = 192,992.70
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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.