Finding the Fourth Proportional to 418,971.96, 628,556.36 and 138,489.20
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Solution
The fourth proportional to 418,971.96, 628,556.36 and 138,489.20 is: 207,766.33
Step by Step Solution
- Step 1: Write the proportion equation
418,971.96 : 628,556.36 = 138,489.20 : x - Step 2: Convert to fraction form
418,971.96/628,556.36 = 138,489.20/x - Step 3: Cross multiply
418,971.96x = 628,556.36 × 138,489.20 - Step 4: Simplify right side
418,971.96x = 87,048,267,451.31 - Step 5: Solve for x
x = 87,048,267,451.31/418,971.96 - Step 6: Final answer
x = 207,766.33
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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.