Finding the Fourth Proportional to 578,809.20, 868,213.80 and 485,497.20
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Solution
The fourth proportional to 578,809.20, 868,213.80 and 485,497.20 is: 728,245.80
Step by Step Solution
- Step 1: Write the proportion equation
578,809.20 : 868,213.80 = 485,497.20 : x - Step 2: Convert to fraction form
578,809.20/868,213.80 = 485,497.20/x - Step 3: Cross multiply
578,809.20x = 868,213.80 × 485,497.20 - Step 4: Simplify right side
578,809.20x = 421,515,368,901.36 - Step 5: Solve for x
x = 421,515,368,901.36/578,809.20 - Step 6: Final answer
x = 728,245.80
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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.