Finding the Fourth Proportional to 312,415.68, 431,134.74 and 169,175.28
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Solution
The fourth proportional to 312,415.68, 431,134.74 and 169,175.28 is: 233,462.48
Step by Step Solution
- Step 1: Write the proportion equation
312,415.68 : 431,134.74 = 169,175.28 : x - Step 2: Convert to fraction form
312,415.68/431,134.74 = 169,175.28/x - Step 3: Cross multiply
312,415.68x = 431,134.74 × 169,175.28 - Step 4: Simplify right side
312,415.68x = 72,937,340,357.23 - Step 5: Solve for x
x = 72,937,340,357.23/312,415.68 - Step 6: Final answer
x = 233,462.48
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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.