Finding the Fourth Proportional to 1,392,306.96, 1,921,346.28 and 819,380.88
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Solution
The fourth proportional to 1,392,306.96, 1,921,346.28 and 819,380.88 is: 1,130,723.65
Step by Step Solution
- Step 1: Write the proportion equation
1,392,306.96 : 1,921,346.28 = 819,380.88 : x - Step 2: Convert to fraction form
1,392,306.96/1,921,346.28 = 819,380.88/x - Step 3: Cross multiply
1,392,306.96x = 1,921,346.28 × 819,380.88 - Step 4: Simplify right side
1,392,306.96x = 1,574,314,405,691.13 - Step 5: Solve for x
x = 1,574,314,405,691.13/1,392,306.96 - Step 6: Final answer
x = 1,130,723.65
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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.