Finding the Fourth Proportional to 991,423.98, 1,368,173.75 and 538,714.98
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Solution
The fourth proportional to 991,423.98, 1,368,173.75 and 538,714.98 is: 743,431.37
Step by Step Solution
- Step 1: Write the proportion equation
991,423.98 : 1,368,173.75 = 538,714.98 : x - Step 2: Convert to fraction form
991,423.98/1,368,173.75 = 538,714.98/x - Step 3: Cross multiply
991,423.98x = 1,368,173.75 × 538,714.98 - Step 4: Simplify right side
991,423.98x = 737,055,691,674.20 - Step 5: Solve for x
x = 737,055,691,674.20/991,423.98 - Step 6: Final answer
x = 743,431.37
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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.