Finding the Fourth Proportional to 1,211,799.89, 1,672,207.79 and 667,905.74
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Solution
The fourth proportional to 1,211,799.89, 1,672,207.79 and 667,905.74 is: 921,667.99
Step by Step Solution
- Step 1: Write the proportion equation
1,211,799.89 : 1,672,207.79 = 667,905.74 : x - Step 2: Convert to fraction form
1,211,799.89/1,672,207.79 = 667,905.74/x - Step 3: Cross multiply
1,211,799.89x = 1,672,207.79 × 667,905.74 - Step 4: Simplify right side
1,211,799.89x = 1,116,877,169,713.15 - Step 5: Solve for x
x = 1,116,877,169,713.15/1,211,799.89 - Step 6: Final answer
x = 921,667.99
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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.