Finding the Fourth Proportional to 306,728.10, 423,274.41 and 172,566.18
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Solution
The fourth proportional to 306,728.10, 423,274.41 and 172,566.18 is: 238,135.50
Step by Step Solution
- Step 1: Write the proportion equation
306,728.10 : 423,274.41 = 172,566.18 : x - Step 2: Convert to fraction form
306,728.10/423,274.41 = 172,566.18/x - Step 3: Cross multiply
306,728.10x = 423,274.41 × 172,566.18 - Step 4: Simplify right side
306,728.10x = 73,042,848,025.45 - Step 5: Solve for x
x = 73,042,848,025.45/306,728.10 - Step 6: Final answer
x = 238,135.50
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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.