Finding the Fourth Proportional to 280,920.99, 421,393.79 and 81,261.56
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Solution
The fourth proportional to 280,920.99, 421,393.79 and 81,261.56 is: 121,895.89
Step by Step Solution
- Step 1: Write the proportion equation
280,920.99 : 421,393.79 = 81,261.56 : x - Step 2: Convert to fraction form
280,920.99/421,393.79 = 81,261.56/x - Step 3: Cross multiply
280,920.99x = 421,393.79 × 81,261.56 - Step 4: Simplify right side
280,920.99x = 34,243,114,236.44 - Step 5: Solve for x
x = 34,243,114,236.44/280,920.99 - Step 6: Final answer
x = 121,895.89
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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.