Finding the Fourth Proportional to 305,403.12, 421,456.80 and 169,432.80
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Solution
The fourth proportional to 305,403.12, 421,456.80 and 169,432.80 is: 233,817.54
Step by Step Solution
- Step 1: Write the proportion equation
305,403.12 : 421,456.80 = 169,432.80 : x - Step 2: Convert to fraction form
305,403.12/421,456.80 = 169,432.80/x - Step 3: Cross multiply
305,403.12x = 421,456.80 × 169,432.80 - Step 4: Simplify right side
305,403.12x = 71,408,605,703.04 - Step 5: Solve for x
x = 71,408,605,703.04/305,403.12 - Step 6: Final answer
x = 233,817.54
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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.