Finding the Fourth Proportional to 312,739.98, 431,580.96 and 169,499.94
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Solution
The fourth proportional to 312,739.98, 431,580.96 and 169,499.94 is: 233,909.80
Step by Step Solution
- Step 1: Write the proportion equation
312,739.98 : 431,580.96 = 169,499.94 : x - Step 2: Convert to fraction form
312,739.98/431,580.96 = 169,499.94/x - Step 3: Cross multiply
312,739.98x = 431,580.96 × 169,499.94 - Step 4: Simplify right side
312,739.98x = 73,152,946,825.14 - Step 5: Solve for x
x = 73,152,946,825.14/312,739.98 - Step 6: Final answer
x = 233,909.80
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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.