Finding the Fourth Proportional to 638,535.06, 879,558.21 and 487,369.62
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Solution
The fourth proportional to 638,535.06, 879,558.21 and 487,369.62 is: 671,333.46
Step by Step Solution
- Step 1: Write the proportion equation
638,535.06 : 879,558.21 = 487,369.62 : x - Step 2: Convert to fraction form
638,535.06/879,558.21 = 487,369.62/x - Step 3: Cross multiply
638,535.06x = 879,558.21 × 487,369.62 - Step 4: Simplify right side
638,535.06x = 428,669,950,575.58 - Step 5: Solve for x
x = 428,669,950,575.58/638,535.06 - Step 6: Final answer
x = 671,333.46
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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.