Finding the Fourth Proportional to 289,979.20, 436,135.20 and 259,652.80
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Solution
The fourth proportional to 289,979.20, 436,135.20 and 259,652.80 is: 390,523.62
Step by Step Solution
- Step 1: Write the proportion equation
289,979.20 : 436,135.20 = 259,652.80 : x - Step 2: Convert to fraction form
289,979.20/436,135.20 = 259,652.80/x - Step 3: Cross multiply
289,979.20x = 436,135.20 × 259,652.80 - Step 4: Simplify right side
289,979.20x = 113,243,725,858.56 - Step 5: Solve for x
x = 113,243,725,858.56/289,979.20 - Step 6: Final answer
x = 390,523.62
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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.