Finding the Fourth Proportional to 520,219.80, 780,329.70 and 489,115.80
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Solution
The fourth proportional to 520,219.80, 780,329.70 and 489,115.80 is: 733,673.70
Step by Step Solution
- Step 1: Write the proportion equation
520,219.80 : 780,329.70 = 489,115.80 : x - Step 2: Convert to fraction form
520,219.80/780,329.70 = 489,115.80/x - Step 3: Cross multiply
520,219.80x = 780,329.70 × 489,115.80 - Step 4: Simplify right side
520,219.80x = 381,671,585,479.26 - Step 5: Solve for x
x = 381,671,585,479.26/520,219.80 - Step 6: Final answer
x = 733,673.70
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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.