Finding the Fourth Proportional to 430,681.78, 645,973.37 and 115,163.29
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Solution
The fourth proportional to 430,681.78, 645,973.37 and 115,163.29 is: 172,731.75
Step by Step Solution
- Step 1: Write the proportion equation
430,681.78 : 645,973.37 = 115,163.29 : x - Step 2: Convert to fraction form
430,681.78/645,973.37 = 115,163.29/x - Step 3: Cross multiply
430,681.78x = 645,973.37 × 115,163.29 - Step 4: Simplify right side
430,681.78x = 74,392,419,205.10 - Step 5: Solve for x
x = 74,392,419,205.10/430,681.78 - Step 6: Final answer
x = 172,731.75
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.