Finding the Fourth Proportional to 721,660.34, 995,893.86 and 390,516.26
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Solution
The fourth proportional to 721,660.34, 995,893.86 and 390,516.26 is: 538,913.84
Step by Step Solution
- Step 1: Write the proportion equation
721,660.34 : 995,893.86 = 390,516.26 : x - Step 2: Convert to fraction form
721,660.34/995,893.86 = 390,516.26/x - Step 3: Cross multiply
721,660.34x = 995,893.86 × 390,516.26 - Step 4: Simplify right side
721,660.34x = 388,912,745,564.16 - Step 5: Solve for x
x = 388,912,745,564.16/721,660.34 - Step 6: Final answer
x = 538,913.84
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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.