Finding the Fourth Proportional to 679,935.18, 938,311.50 and 378,129.18
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Solution
The fourth proportional to 679,935.18, 938,311.50 and 378,129.18 is: 521,818.80
Step by Step Solution
- Step 1: Write the proportion equation
679,935.18 : 938,311.50 = 378,129.18 : x - Step 2: Convert to fraction form
679,935.18/938,311.50 = 378,129.18/x - Step 3: Cross multiply
679,935.18x = 938,311.50 × 378,129.18 - Step 4: Simplify right side
679,935.18x = 354,802,958,079.57 - Step 5: Solve for x
x = 354,802,958,079.57/679,935.18 - Step 6: Final answer
x = 521,818.80
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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.