Finding the Fourth Proportional to 715,982.49, 988,030.17 and 393,689.79
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Solution
The fourth proportional to 715,982.49, 988,030.17 and 393,689.79 is: 543,277.80
Step by Step Solution
- Step 1: Write the proportion equation
715,982.49 : 988,030.17 = 393,689.79 : x - Step 2: Convert to fraction form
715,982.49/988,030.17 = 393,689.79/x - Step 3: Cross multiply
715,982.49x = 988,030.17 × 393,689.79 - Step 4: Simplify right side
715,982.49x = 388,977,390,140.96 - Step 5: Solve for x
x = 388,977,390,140.96/715,982.49 - Step 6: Final answer
x = 543,277.80
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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.