Finding the Fourth Proportional to 646,193.68, 891,755.76 and 355,839.28
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Solution
The fourth proportional to 646,193.68, 891,755.76 and 355,839.28 is: 491,062.88
Step by Step Solution
- Step 1: Write the proportion equation
646,193.68 : 891,755.76 = 355,839.28 : x - Step 2: Convert to fraction form
646,193.68/891,755.76 = 355,839.28/x - Step 3: Cross multiply
646,193.68x = 891,755.76 × 355,839.28 - Step 4: Simplify right side
646,193.68x = 317,321,727,574.25 - Step 5: Solve for x
x = 317,321,727,574.25/646,193.68 - Step 6: Final answer
x = 491,062.88
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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.