Finding the Fourth Proportional to 768,420,474.30, 1,062,207,430.11 and 685,609,369.38
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Solution
The fourth proportional to 768,420,474.30, 1,062,207,430.11 and 685,609,369.38 is: 947,735,505.06
Step by Step Solution
- Step 1: Write the proportion equation
768,420,474.30 : 1,062,207,430.11 = 685,609,369.38 : x - Step 2: Convert to fraction form
768,420,474.30/1,062,207,430.11 = 685,609,369.38/x - Step 3: Cross multiply
768,420,474.30x = 1,062,207,430.11 × 685,609,369.38 - Step 4: Simplify right side
768,420,474.30x = 728,259,366,308,467,584 - Step 5: Solve for x
x = 728,259,366,308,467,584/768,420,474.30 - Step 6: Final answer
x = 947,735,505.06
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1.5x scale
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.