Finding the Fourth Proportional to 421,628.08, 632,438.76 and 172,135.12
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Solution
The fourth proportional to 421,628.08, 632,438.76 and 172,135.12 is: 258,201.31
Step by Step Solution
- Step 1: Write the proportion equation
421,628.08 : 632,438.76 = 172,135.12 : x - Step 2: Convert to fraction form
421,628.08/632,438.76 = 172,135.12/x - Step 3: Cross multiply
421,628.08x = 632,438.76 × 172,135.12 - Step 4: Simplify right side
421,628.08x = 108,864,921,845.25 - Step 5: Solve for x
x = 108,864,921,845.25/421,628.08 - Step 6: Final answer
x = 258,201.31
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.