Finding the Fourth Proportional to 326,535.80, 489,803.70 and 139,911.80
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Solution
The fourth proportional to 326,535.80, 489,803.70 and 139,911.80 is: 209,867.70
Step by Step Solution
- Step 1: Write the proportion equation
326,535.80 : 489,803.70 = 139,911.80 : x - Step 2: Convert to fraction form
326,535.80/489,803.70 = 139,911.80/x - Step 3: Cross multiply
326,535.80x = 489,803.70 × 139,911.80 - Step 4: Simplify right side
326,535.80x = 68,529,317,313.66 - Step 5: Solve for x
x = 68,529,317,313.66/326,535.80 - Step 6: Final answer
x = 209,867.70
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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.