Finding the Fourth Proportional to 278,797.41, 418,406.43 and 129,142.70
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Solution
The fourth proportional to 278,797.41, 418,406.43 and 129,142.70 is: 193,811.46
Step by Step Solution
- Step 1: Write the proportion equation
278,797.41 : 418,406.43 = 129,142.70 : x - Step 2: Convert to fraction form
278,797.41/418,406.43 = 129,142.70/x - Step 3: Cross multiply
278,797.41x = 418,406.43 × 129,142.70 - Step 4: Simplify right side
278,797.41x = 54,034,133,975.53 - Step 5: Solve for x
x = 54,034,133,975.53/278,797.41 - Step 6: Final answer
x = 193,811.46
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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.