Finding the Fourth Proportional to 1,321,126.18, 1,981,616.13 and 361,512.91
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Solution
The fourth proportional to 1,321,126.18, 1,981,616.13 and 361,512.91 is: 542,249.35
Step by Step Solution
- Step 1: Write the proportion equation
1,321,126.18 : 1,981,616.13 = 361,512.91 : x - Step 2: Convert to fraction form
1,321,126.18/1,981,616.13 = 361,512.91/x - Step 3: Cross multiply
1,321,126.18x = 1,981,616.13 × 361,512.91 - Step 4: Simplify right side
1,321,126.18x = 716,379,803,751.16 - Step 5: Solve for x
x = 716,379,803,751.16/1,321,126.18 - Step 6: Final answer
x = 542,249.35
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1.5x scale
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.