Finding the Fourth Proportional to 721,628.16, 995,822.36 and 399,351.84
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Solution
The fourth proportional to 721,628.16, 995,822.36 and 399,351.84 is: 551,091.98
Step by Step Solution
- Step 1: Write the proportion equation
721,628.16 : 995,822.36 = 399,351.84 : x - Step 2: Convert to fraction form
721,628.16/995,822.36 = 399,351.84/x - Step 3: Cross multiply
721,628.16x = 995,822.36 × 399,351.84 - Step 4: Simplify right side
721,628.16x = 397,683,491,779.14 - Step 5: Solve for x
x = 397,683,491,779.14/721,628.16 - Step 6: Final answer
x = 551,091.98
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1.5x scale
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.