Finding the Fourth Proportional to 512,457.20, 768,685.80 and 489,129.20
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Solution
The fourth proportional to 512,457.20, 768,685.80 and 489,129.20 is: 733,693.80
Step by Step Solution
- Step 1: Write the proportion equation
512,457.20 : 768,685.80 = 489,129.20 : x - Step 2: Convert to fraction form
512,457.20/768,685.80 = 489,129.20/x - Step 3: Cross multiply
512,457.20x = 768,685.80 × 489,129.20 - Step 4: Simplify right side
512,457.20x = 375,986,670,405.36 - Step 5: Solve for x
x = 375,986,670,405.36/512,457.20 - Step 6: Final answer
x = 733,693.80
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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.