Finding the Fourth Proportional to 312,782.42, 431,639.32 and 169,542.42
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Solution
The fourth proportional to 312,782.42, 431,639.32 and 169,542.42 is: 233,968.32
Step by Step Solution
- Step 1: Write the proportion equation
312,782.42 : 431,639.32 = 169,542.42 : x - Step 2: Convert to fraction form
312,782.42/431,639.32 = 169,542.42/x - Step 3: Cross multiply
312,782.42x = 431,639.32 × 169,542.42 - Step 4: Simplify right side
312,782.42x = 73,181,175,583.31 - Step 5: Solve for x
x = 73,181,175,583.31/312,782.42 - Step 6: Final answer
x = 233,968.32
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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.