Finding the Fourth Proportional to 458,212.80, 687,319.20 and 399,163.80
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Solution
The fourth proportional to 458,212.80, 687,319.20 and 399,163.80 is: 598,745.70
Step by Step Solution
- Step 1: Write the proportion equation
458,212.80 : 687,319.20 = 399,163.80 : x - Step 2: Convert to fraction form
458,212.80/687,319.20 = 399,163.80/x - Step 3: Cross multiply
458,212.80x = 687,319.20 × 399,163.80 - Step 4: Simplify right side
458,212.80x = 274,352,943,684.96 - Step 5: Solve for x
x = 274,352,943,684.96/458,212.80 - Step 6: Final answer
x = 598,745.70
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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.