Finding the Fourth Proportional to 312,369.02, 431,067.30 and 169,128.62
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Solution
The fourth proportional to 312,369.02, 431,067.30 and 169,128.62 is: 233,396.44
Step by Step Solution
- Step 1: Write the proportion equation
312,369.02 : 431,067.30 = 169,128.62 : x - Step 2: Convert to fraction form
312,369.02/431,067.30 = 169,128.62/x - Step 3: Cross multiply
312,369.02x = 431,067.30 × 169,128.62 - Step 4: Simplify right side
312,369.02x = 72,905,817,576.13 - Step 5: Solve for x
x = 72,905,817,576.13/312,369.02 - Step 6: Final answer
x = 233,396.44
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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.