Finding the Fourth Proportional to 391,053.06, 539,661.42 and 221,287.14
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Solution
The fourth proportional to 391,053.06, 539,661.42 and 221,287.14 is: 305,380.89
Step by Step Solution
- Step 1: Write the proportion equation
391,053.06 : 539,661.42 = 221,287.14 : x - Step 2: Convert to fraction form
391,053.06/539,661.42 = 221,287.14/x - Step 3: Cross multiply
391,053.06x = 539,661.42 × 221,287.14 - Step 4: Simplify right side
391,053.06x = 119,420,132,200.14 - Step 5: Solve for x
x = 119,420,132,200.14/391,053.06 - Step 6: Final answer
x = 305,380.89
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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.