Finding the Fourth Proportional to 1,393,408.23, 1,923,056.96 and 781,620.63
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Solution
The fourth proportional to 1,393,408.23, 1,923,056.96 and 781,620.63 is: 1,078,722.63
Step by Step Solution
- Step 1: Write the proportion equation
1,393,408.23 : 1,923,056.96 = 781,620.63 : x - Step 2: Convert to fraction form
1,393,408.23/1,923,056.96 = 781,620.63/x - Step 3: Cross multiply
1,393,408.23x = 1,923,056.96 × 781,620.63 - Step 4: Simplify right side
1,393,408.23x = 1,503,100,988,692.98 - Step 5: Solve for x
x = 1,503,100,988,692.98/1,393,408.23 - Step 6: Final answer
x = 1,078,722.63
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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.