Finding the Fourth Proportional to 1,380,799.12, 1,905,381.48 and 768,905.68
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Solution
The fourth proportional to 1,380,799.12, 1,905,381.48 and 768,905.68 is: 1,061,022.29
Step by Step Solution
- Step 1: Write the proportion equation
1,380,799.12 : 1,905,381.48 = 768,905.68 : x - Step 2: Convert to fraction form
1,380,799.12/1,905,381.48 = 768,905.68/x - Step 3: Cross multiply
1,380,799.12x = 1,905,381.48 × 768,905.68 - Step 4: Simplify right side
1,380,799.12x = 1,465,058,642,538.81 - Step 5: Solve for x
x = 1,465,058,642,538.81/1,380,799.12 - Step 6: Final answer
x = 1,061,022.29
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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.