Finding the Fourth Proportional to 780,159.70, 1,170,239.55 and 721,839.70
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Solution
The fourth proportional to 780,159.70, 1,170,239.55 and 721,839.70 is: 1,082,759.55
Step by Step Solution
- Step 1: Write the proportion equation
780,159.70 : 1,170,239.55 = 721,839.70 : x - Step 2: Convert to fraction form
780,159.70/1,170,239.55 = 721,839.70/x - Step 3: Cross multiply
780,159.70x = 1,170,239.55 × 721,839.70 - Step 4: Simplify right side
780,159.70x = 844,725,365,700.14 - Step 5: Solve for x
x = 844,725,365,700.14/780,159.70 - Step 6: Final answer
x = 1,082,759.55
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1.5x scale
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.