Finding the Fourth Proportional to 338,936.18, 508,102.22 and 128,721.74
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Solution
The fourth proportional to 338,936.18, 508,102.22 and 128,721.74 is: 192,967.90
Step by Step Solution
- Step 1: Write the proportion equation
338,936.18 : 508,102.22 = 128,721.74 : x - Step 2: Convert to fraction form
338,936.18/508,102.22 = 128,721.74/x - Step 3: Cross multiply
338,936.18x = 508,102.22 × 128,721.74 - Step 4: Simplify right side
338,936.18x = 65,403,801,856.26 - Step 5: Solve for x
x = 65,403,801,856.26/338,936.18 - Step 6: Final answer
x = 192,967.90
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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.