Finding the Fourth Proportional to 638,435.20, 955,809.60 and 389,603.20
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Solution
The fourth proportional to 638,435.20, 955,809.60 and 389,603.20 is: 583,279.99
Step by Step Solution
- Step 1: Write the proportion equation
638,435.20 : 955,809.60 = 389,603.20 : x - Step 2: Convert to fraction form
638,435.20/955,809.60 = 389,603.20/x - Step 3: Cross multiply
638,435.20x = 955,809.60 × 389,603.20 - Step 4: Simplify right side
638,435.20x = 372,386,478,750.72 - Step 5: Solve for x
x = 372,386,478,750.72/638,435.20 - Step 6: Final answer
x = 583,279.99
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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.