Finding the Fourth Proportional to 391,188.12, 539,836.38 and 221,420.76
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Solution
The fourth proportional to 391,188.12, 539,836.38 and 221,420.76 is: 305,558.82
Step by Step Solution
- Step 1: Write the proportion equation
391,188.12 : 539,836.38 = 221,420.76 : x - Step 2: Convert to fraction form
391,188.12/539,836.38 = 221,420.76/x - Step 3: Cross multiply
391,188.12x = 539,836.38 × 221,420.76 - Step 4: Simplify right side
391,188.12x = 119,530,981,535.25 - Step 5: Solve for x
x = 119,530,981,535.25/391,188.12 - Step 6: Final answer
x = 305,558.82
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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.