Finding the Fourth Proportional to 285,230.69, 393,198.95 and 217,128.95
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Solution
The fourth proportional to 285,230.69, 393,198.95 and 217,128.95 is: 299,318.68
Step by Step Solution
- Step 1: Write the proportion equation
285,230.69 : 393,198.95 = 217,128.95 : x - Step 2: Convert to fraction form
285,230.69/393,198.95 = 217,128.95/x - Step 3: Cross multiply
285,230.69x = 393,198.95 × 217,128.95 - Step 4: Simplify right side
285,230.69x = 85,374,872,102.96 - Step 5: Solve for x
x = 85,374,872,102.96/285,230.69 - Step 6: Final answer
x = 299,318.68
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.