Finding the Fourth Proportional to 326,438.40, 489,657.60 and 177,139.20
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Solution
The fourth proportional to 326,438.40, 489,657.60 and 177,139.20 is: 265,708.80
Step by Step Solution
- Step 1: Write the proportion equation
326,438.40 : 489,657.60 = 177,139.20 : x - Step 2: Convert to fraction form
326,438.40/489,657.60 = 177,139.20/x - Step 3: Cross multiply
326,438.40x = 489,657.60 × 177,139.20 - Step 4: Simplify right side
326,438.40x = 86,737,555,537.92 - Step 5: Solve for x
x = 86,737,555,537.92/326,438.40 - Step 6: Final answer
x = 265,708.80
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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.