Finding the Fourth Proportional to 358,699.68, 491,420.70 and 345,247.20
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Solution
The fourth proportional to 358,699.68, 491,420.70 and 345,247.20 is: 472,990.72
Step by Step Solution
- Step 1: Write the proportion equation
358,699.68 : 491,420.70 = 345,247.20 : x - Step 2: Convert to fraction form
358,699.68/491,420.70 = 345,247.20/x - Step 3: Cross multiply
358,699.68x = 491,420.70 × 345,247.20 - Step 4: Simplify right side
358,699.68x = 169,661,620,697.04 - Step 5: Solve for x
x = 169,661,620,697.04/358,699.68 - Step 6: Final answer
x = 472,990.72
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Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.