Finding the Fourth Proportional to 312,959.76, 431,882.10 and 169,720.08
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Solution
The fourth proportional to 312,959.76, 431,882.10 and 169,720.08 is: 234,212.43
Step by Step Solution
- Step 1: Write the proportion equation
312,959.76 : 431,882.10 = 169,720.08 : x - Step 2: Convert to fraction form
312,959.76/431,882.10 = 169,720.08/x - Step 3: Cross multiply
312,959.76x = 431,882.10 × 169,720.08 - Step 4: Simplify right side
312,959.76x = 73,299,064,562.57 - Step 5: Solve for x
x = 73,299,064,562.57/312,959.76 - Step 6: Final answer
x = 234,212.43
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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.