Finding the Fourth Proportional to 664,981.11, 917,679.78 and 378,519.63
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Solution
The fourth proportional to 664,981.11, 917,679.78 and 378,519.63 is: 522,360.42
Step by Step Solution
- Step 1: Write the proportion equation
664,981.11 : 917,679.78 = 378,519.63 : x - Step 2: Convert to fraction form
664,981.11/917,679.78 = 378,519.63/x - Step 3: Cross multiply
664,981.11x = 917,679.78 × 378,519.63 - Step 4: Simplify right side
664,981.11x = 347,359,810,784.08 - Step 5: Solve for x
x = 347,359,810,784.08/664,981.11 - Step 6: Final answer
x = 522,360.42
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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.