Finding the Fourth Proportional to 258,739.20, 387,949.44 and 100,783.68
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Solution
The fourth proportional to 258,739.20, 387,949.44 and 100,783.68 is: 151,113.45
Step by Step Solution
- Step 1: Write the proportion equation
258,739.20 : 387,949.44 = 100,783.68 : x - Step 2: Convert to fraction form
258,739.20/387,949.44 = 100,783.68/x - Step 3: Cross multiply
258,739.20x = 387,949.44 × 100,783.68 - Step 4: Simplify right side
258,739.20x = 39,098,972,217.14 - Step 5: Solve for x
x = 39,098,972,217.14/258,739.20 - Step 6: Final answer
x = 151,113.45
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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.