Finding the Fourth Proportional to 991,877.40, 1,368,804.42 and 539,178.12
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Solution
The fourth proportional to 991,877.40, 1,368,804.42 and 539,178.12 is: 744,073.20
Step by Step Solution
- Step 1: Write the proportion equation
991,877.40 : 1,368,804.42 = 539,178.12 : x - Step 2: Convert to fraction form
991,877.40/1,368,804.42 = 539,178.12/x - Step 3: Cross multiply
991,877.40x = 1,368,804.42 × 539,178.12 - Step 4: Simplify right side
991,877.40x = 738,029,393,823.29 - Step 5: Solve for x
x = 738,029,393,823.29/991,877.40 - Step 6: Final answer
x = 744,073.20
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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.