Finding the Fourth Proportional to 212,897.67, 318,984.99 and 128,480.46
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Solution
The fourth proportional to 212,897.67, 318,984.99 and 128,480.46 is: 192,502.52
Step by Step Solution
- Step 1: Write the proportion equation
212,897.67 : 318,984.99 = 128,480.46 : x - Step 2: Convert to fraction form
212,897.67/318,984.99 = 128,480.46/x - Step 3: Cross multiply
212,897.67x = 318,984.99 × 128,480.46 - Step 4: Simplify right side
212,897.67x = 40,983,338,248.30 - Step 5: Solve for x
x = 40,983,338,248.30/212,897.67 - Step 6: Final answer
x = 192,502.52
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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.