Finding the Fourth Proportional to 721,656.34, 995,888.34 and 390,512.26
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Solution
The fourth proportional to 721,656.34, 995,888.34 and 390,512.26 is: 538,908.32
Step by Step Solution
- Step 1: Write the proportion equation
721,656.34 : 995,888.34 = 390,512.26 : x - Step 2: Convert to fraction form
721,656.34/995,888.34 = 390,512.26/x - Step 3: Cross multiply
721,656.34x = 995,888.34 × 390,512.26 - Step 4: Simplify right side
721,656.34x = 388,906,606,361.05 - Step 5: Solve for x
x = 388,906,606,361.05/721,656.34 - Step 6: Final answer
x = 538,908.32
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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.