Finding the Fourth Proportional to 780,090.15, 1,170,135.23 and 647,120.55
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Solution
The fourth proportional to 780,090.15, 1,170,135.23 and 647,120.55 is: 970,680.83
Step by Step Solution
- Step 1: Write the proportion equation
780,090.15 : 1,170,135.23 = 647,120.55 : x - Step 2: Convert to fraction form
780,090.15/1,170,135.23 = 647,120.55/x - Step 3: Cross multiply
780,090.15x = 1,170,135.23 × 647,120.55 - Step 4: Simplify right side
780,090.15x = 757,218,550,376.37 - Step 5: Solve for x
x = 757,218,550,376.37/780,090.15 - Step 6: Final answer
x = 970,680.83
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.