Finding the Fourth Proportional to 221,318.48, 305,415.24 and 120,717.20
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Solution
The fourth proportional to 221,318.48, 305,415.24 and 120,717.20 is: 166,587.41
Step by Step Solution
- Step 1: Write the proportion equation
221,318.48 : 305,415.24 = 120,717.20 : x - Step 2: Convert to fraction form
221,318.48/305,415.24 = 120,717.20/x - Step 3: Cross multiply
221,318.48x = 305,415.24 × 120,717.20 - Step 4: Simplify right side
221,318.48x = 36,868,872,610.13 - Step 5: Solve for x
x = 36,868,872,610.13/221,318.48 - Step 6: Final answer
x = 166,587.41
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.