Finding the Fourth Proportional to 421,203.80, 631,805.70 and 168,605.30
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Solution
The fourth proportional to 421,203.80, 631,805.70 and 168,605.30 is: 252,907.95
Step by Step Solution
- Step 1: Write the proportion equation
421,203.80 : 631,805.70 = 168,605.30 : x - Step 2: Convert to fraction form
421,203.80/631,805.70 = 168,605.30/x - Step 3: Cross multiply
421,203.80x = 631,805.70 × 168,605.30 - Step 4: Simplify right side
421,203.80x = 106,525,789,590.21 - Step 5: Solve for x
x = 106,525,789,590.21/421,203.80 - Step 6: Final answer
x = 252,907.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.