Finding the Fourth Proportional to 1,378,830.12, 1,902,163.68 and 805,612.56
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Solution
The fourth proportional to 1,378,830.12, 1,902,163.68 and 805,612.56 is: 1,111,381.98
Step by Step Solution
- Step 1: Write the proportion equation
1,378,830.12 : 1,902,163.68 = 805,612.56 : x - Step 2: Convert to fraction form
1,378,830.12/1,902,163.68 = 805,612.56/x - Step 3: Cross multiply
1,378,830.12x = 1,902,163.68 × 805,612.56 - Step 4: Simplify right side
1,378,830.12x = 1,532,406,951,783.82 - Step 5: Solve for x
x = 1,532,406,951,783.82/1,378,830.12 - Step 6: Final answer
x = 1,111,381.98
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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.