Finding the Fourth Proportional to 991,129.13, 1,367,758.20 and 538,420.13
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Solution
The fourth proportional to 991,129.13, 1,367,758.20 and 538,420.13 is: 743,019.78
Step by Step Solution
- Step 1: Write the proportion equation
991,129.13 : 1,367,758.20 = 538,420.13 : x - Step 2: Convert to fraction form
991,129.13/1,367,758.20 = 538,420.13/x - Step 3: Cross multiply
991,129.13x = 1,367,758.20 × 538,420.13 - Step 4: Simplify right side
991,129.13x = 736,428,541,013.78 - Step 5: Solve for x
x = 736,428,541,013.78/991,129.13 - Step 6: Final answer
x = 743,019.78
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.