Finding the Fourth Proportional to 991,615.38, 1,368,390.69 and 538,896.66
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Solution
The fourth proportional to 991,615.38, 1,368,390.69 and 538,896.66 is: 743,656.45
Step by Step Solution
- Step 1: Write the proportion equation
991,615.38 : 1,368,390.69 = 538,896.66 : x - Step 2: Convert to fraction form
991,615.38/1,368,390.69 = 538,896.66/x - Step 3: Cross multiply
991,615.38x = 1,368,390.69 × 538,896.66 - Step 4: Simplify right side
991,615.38x = 737,421,172,416.10 - Step 5: Solve for x
x = 737,421,172,416.10/991,615.38 - Step 6: Final answer
x = 743,656.45
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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.