Finding the Fourth Proportional to 289,888.20, 434,486.70 and 121,408.20
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Solution
The fourth proportional to 289,888.20, 434,486.70 and 121,408.20 is: 181,967.56
Step by Step Solution
- Step 1: Write the proportion equation
289,888.20 : 434,486.70 = 121,408.20 : x - Step 2: Convert to fraction form
289,888.20/434,486.70 = 121,408.20/x - Step 3: Cross multiply
289,888.20x = 434,486.70 × 121,408.20 - Step 4: Simplify right side
289,888.20x = 52,750,248,170.94 - Step 5: Solve for x
x = 52,750,248,170.94/289,888.20 - Step 6: Final answer
x = 181,967.56
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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.