Finding the Fourth Proportional to 1,230,991.28, 1,699,051.36 and 721,857.68
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Solution
The fourth proportional to 1,230,991.28, 1,699,051.36 and 721,857.68 is: 996,329.78
Step by Step Solution
- Step 1: Write the proportion equation
1,230,991.28 : 1,699,051.36 = 721,857.68 : x - Step 2: Convert to fraction form
1,230,991.28/1,699,051.36 = 721,857.68/x - Step 3: Cross multiply
1,230,991.28x = 1,699,051.36 × 721,857.68 - Step 4: Simplify right side
1,230,991.28x = 1,226,473,272,930.45 - Step 5: Solve for x
x = 1,226,473,272,930.45/1,230,991.28 - Step 6: Final answer
x = 996,329.78
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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.