Finding the Fourth Proportional to 390,936.75, 539,489.07 and 221,170.88
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Solution
The fourth proportional to 390,936.75, 539,489.07 and 221,170.88 is: 305,213.75
Step by Step Solution
- Step 1: Write the proportion equation
390,936.75 : 539,489.07 = 221,170.88 : x - Step 2: Convert to fraction form
390,936.75/539,489.07 = 221,170.88/x - Step 3: Cross multiply
390,936.75x = 539,489.07 × 221,170.88 - Step 4: Simplify right side
390,936.75x = 119,319,269,664.84 - Step 5: Solve for x
x = 119,319,269,664.84/390,936.75 - Step 6: Final answer
x = 305,213.75
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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.