Finding the Fourth Proportional to 1,393,420.79, 1,923,074.29 and 781,633.19
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Solution
The fourth proportional to 1,393,420.79, 1,923,074.29 and 781,633.19 is: 1,078,739.97
Step by Step Solution
- Step 1: Write the proportion equation
1,393,420.79 : 1,923,074.29 = 781,633.19 : x - Step 2: Convert to fraction form
1,393,420.79/1,923,074.29 = 781,633.19/x - Step 3: Cross multiply
1,393,420.79x = 1,923,074.29 × 781,633.19 - Step 4: Simplify right side
1,393,420.79x = 1,503,138,697,684.41 - Step 5: Solve for x
x = 1,503,138,697,684.41/1,393,420.79 - Step 6: Final answer
x = 1,078,739.97
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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.