Finding the Fourth Proportional to 715,968.87, 988,040.69 and 393,699.84
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Solution
The fourth proportional to 715,968.87, 988,040.69 and 393,699.84 is: 543,307.79
Step by Step Solution
- Step 1: Write the proportion equation
715,968.87 : 988,040.69 = 393,699.84 : x - Step 2: Convert to fraction form
715,968.87/988,040.69 = 393,699.84/x - Step 3: Cross multiply
715,968.87x = 988,040.69 × 393,699.84 - Step 4: Simplify right side
715,968.87x = 388,991,461,566.49 - Step 5: Solve for x
x = 388,991,461,566.49/715,968.87 - Step 6: Final answer
x = 543,307.79
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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.