Finding the Fourth Proportional to 763,135.20, 1,143,147.60 and 389,368.80
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Solution
The fourth proportional to 763,135.20, 1,143,147.60 and 389,368.80 is: 583,259.70
Step by Step Solution
- Step 1: Write the proportion equation
763,135.20 : 1,143,147.60 = 389,368.80 : x - Step 2: Convert to fraction form
763,135.20/1,143,147.60 = 389,368.80/x - Step 3: Cross multiply
763,135.20x = 1,143,147.60 × 389,368.80 - Step 4: Simplify right side
763,135.20x = 445,106,009,234.88 - Step 5: Solve for x
x = 445,106,009,234.88/763,135.20 - Step 6: Final answer
x = 583,259.70
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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.