Finding the Fourth Proportional to 678,439,514.88, 1,017,821,635.20 and 218,420,686.08
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Solution
The fourth proportional to 678,439,514.88, 1,017,821,635.20 and 218,420,686.08 is: 327,683,301.15
Step by Step Solution
- Step 1: Write the proportion equation
678,439,514.88 : 1,017,821,635.20 = 218,420,686.08 : x - Step 2: Convert to fraction form
678,439,514.88/1,017,821,635.20 = 218,420,686.08/x - Step 3: Cross multiply
678,439,514.88x = 1,017,821,635.20 × 218,420,686.08 - Step 4: Simplify right side
678,439,514.88x = 222,313,299,867,451,488 - Step 5: Solve for x
x = 222,313,299,867,451,488/678,439,514.88 - Step 6: Final answer
x = 327,683,301.15
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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.