Finding the Fourth Proportional to 393,138.24, 542,514.69 and 221,051.31
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Solution
The fourth proportional to 393,138.24, 542,514.69 and 221,051.31 is: 305,041.77
Step by Step Solution
- Step 1: Write the proportion equation
393,138.24 : 542,514.69 = 221,051.31 : x - Step 2: Convert to fraction form
393,138.24/542,514.69 = 221,051.31/x - Step 3: Cross multiply
393,138.24x = 542,514.69 × 221,051.31 - Step 4: Simplify right side
393,138.24x = 119,923,582,918.74 - Step 5: Solve for x
x = 119,923,582,918.74/393,138.24 - Step 6: Final answer
x = 305,041.77
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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.