Finding the Fourth Proportional to 285,742.74, 428,703.36 and 172,015.08
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Solution
The fourth proportional to 285,742.74, 428,703.36 and 172,015.08 is: 258,076.35
Step by Step Solution
- Step 1: Write the proportion equation
285,742.74 : 428,703.36 = 172,015.08 : x - Step 2: Convert to fraction form
285,742.74/428,703.36 = 172,015.08/x - Step 3: Cross multiply
285,742.74x = 428,703.36 × 172,015.08 - Step 4: Simplify right side
285,742.74x = 73,743,442,766.67 - Step 5: Solve for x
x = 73,743,442,766.67/285,742.74 - Step 6: Final answer
x = 258,076.35
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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.