Finding the Fourth Proportional to 721,661.76, 995,895.12 and 399,394.08
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Solution
The fourth proportional to 721,661.76, 995,895.12 and 399,394.08 is: 551,164.88
Step by Step Solution
- Step 1: Write the proportion equation
721,661.76 : 995,895.12 = 399,394.08 : x - Step 2: Convert to fraction form
721,661.76/995,895.12 = 399,394.08/x - Step 3: Cross multiply
721,661.76x = 995,895.12 × 399,394.08 - Step 4: Simplify right side
721,661.76x = 397,754,615,228.89 - Step 5: Solve for x
x = 397,754,615,228.89/721,661.76 - Step 6: Final answer
x = 551,164.88
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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.