Finding the Fourth Proportional to 641,935.16, 885,859.70 and 355,449.09
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Solution
The fourth proportional to 641,935.16, 885,859.70 and 355,449.09 is: 490,513.75
Step by Step Solution
- Step 1: Write the proportion equation
641,935.16 : 885,859.70 = 355,449.09 : x - Step 2: Convert to fraction form
641,935.16/885,859.70 = 355,449.09/x - Step 3: Cross multiply
641,935.16x = 885,859.70 × 355,449.09 - Step 4: Simplify right side
641,935.16x = 314,878,022,455.43 - Step 5: Solve for x
x = 314,878,022,455.43/641,935.16 - Step 6: Final answer
x = 490,513.75
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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.