Finding the Fourth Proportional to 715,690.36, 987,646.87 and 393,397.03
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Solution
The fourth proportional to 715,690.36, 987,646.87 and 393,397.03 is: 542,884.70
Step by Step Solution
- Step 1: Write the proportion equation
715,690.36 : 987,646.87 = 393,397.03 : x - Step 2: Convert to fraction form
715,690.36/987,646.87 = 393,397.03/x - Step 3: Cross multiply
715,690.36x = 987,646.87 × 393,397.03 - Step 4: Simplify right side
715,690.36x = 388,537,345,346.80 - Step 5: Solve for x
x = 388,537,345,346.80/715,690.36 - Step 6: Final answer
x = 542,884.70
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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.