Finding the Fourth Proportional to 319,285.35, 440,382.21 and 217,129.23
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Solution
The fourth proportional to 319,285.35, 440,382.21 and 217,129.23 is: 299,480.86
Step by Step Solution
- Step 1: Write the proportion equation
319,285.35 : 440,382.21 = 217,129.23 : x - Step 2: Convert to fraction form
319,285.35/440,382.21 = 217,129.23/x - Step 3: Cross multiply
319,285.35x = 440,382.21 × 217,129.23 - Step 4: Simplify right side
319,285.35x = 95,619,850,163.00 - Step 5: Solve for x
x = 95,619,850,163.00/319,285.35 - Step 6: Final answer
x = 299,480.86
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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.