Finding the Fourth Proportional to 419,135.30, 628,703.15 and 138,652.55
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Solution
The fourth proportional to 419,135.30, 628,703.15 and 138,652.55 is: 207,978.88
Step by Step Solution
- Step 1: Write the proportion equation
419,135.30 : 628,703.15 = 138,652.55 : x - Step 2: Convert to fraction form
419,135.30/628,703.15 = 138,652.55/x - Step 3: Cross multiply
419,135.30x = 628,703.15 × 138,652.55 - Step 4: Simplify right side
419,135.30x = 87,171,291,103.75 - Step 5: Solve for x
x = 87,171,291,103.75/419,135.30 - Step 6: Final answer
x = 207,978.88
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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.