Finding the Fourth Proportional to 418,960.96, 628,539.86 and 138,478.21
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Solution
The fourth proportional to 418,960.96, 628,539.86 and 138,478.21 is: 207,749.85
Step by Step Solution
- Step 1: Write the proportion equation
418,960.96 : 628,539.86 = 138,478.21 : x - Step 2: Convert to fraction form
418,960.96/628,539.86 = 138,478.21/x - Step 3: Cross multiply
418,960.96x = 628,539.86 × 138,478.21 - Step 4: Simplify right side
418,960.96x = 87,039,074,726.45 - Step 5: Solve for x
x = 87,039,074,726.45/418,960.96 - Step 6: Final answer
x = 207,749.85
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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.