Finding the Fourth Proportional to 278,439.12, 417,658.68 and 68,074.56
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Solution
The fourth proportional to 278,439.12, 417,658.68 and 68,074.56 is: 102,111.84
Step by Step Solution
- Step 1: Write the proportion equation
278,439.12 : 417,658.68 = 68,074.56 : x - Step 2: Convert to fraction form
278,439.12/417,658.68 = 68,074.56/x - Step 3: Cross multiply
278,439.12x = 417,658.68 × 68,074.56 - Step 4: Simplify right side
278,439.12x = 28,431,930,871.18 - Step 5: Solve for x
x = 28,431,930,871.18/278,439.12 - Step 6: Final answer
x = 102,111.84
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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.