Finding the Fourth Proportional to 426,394.81, 639,583.35 and 142,105.96
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Solution
The fourth proportional to 426,394.81, 639,583.35 and 142,105.96 is: 213,155.99
Step by Step Solution
- Step 1: Write the proportion equation
426,394.81 : 639,583.35 = 142,105.96 : x - Step 2: Convert to fraction form
426,394.81/639,583.35 = 142,105.96/x - Step 3: Cross multiply
426,394.81x = 639,583.35 × 142,105.96 - Step 4: Simplify right side
426,394.81x = 90,888,605,951.77 - Step 5: Solve for x
x = 90,888,605,951.77/426,394.81 - Step 6: Final answer
x = 213,155.99
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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.