Finding the Fourth Proportional to 258,287.22, 386,709.12 and 139,533.12
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Solution
The fourth proportional to 258,287.22, 386,709.12 and 139,533.12 is: 208,909.79
Step by Step Solution
- Step 1: Write the proportion equation
258,287.22 : 386,709.12 = 139,533.12 : x - Step 2: Convert to fraction form
258,287.22/386,709.12 = 139,533.12/x - Step 3: Cross multiply
258,287.22x = 386,709.12 × 139,533.12 - Step 4: Simplify right side
258,287.22x = 53,958,730,046.05 - Step 5: Solve for x
x = 53,958,730,046.05/258,287.22 - Step 6: Final answer
x = 208,909.79
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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.