Finding the Fourth Proportional to 1,292,912,194.79, 1,939,368,317.92 and 310,338,734.29
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Solution
The fourth proportional to 1,292,912,194.79, 1,939,368,317.92 and 310,338,734.29 is: 465,508,107.61
Step by Step Solution
- Step 1: Write the proportion equation
1,292,912,194.79 : 1,939,368,317.92 = 310,338,734.29 : x - Step 2: Convert to fraction form
1,292,912,194.79/1,939,368,317.92 = 310,338,734.29/x - Step 3: Cross multiply
1,292,912,194.79x = 1,939,368,317.92 × 310,338,734.29 - Step 4: Simplify right side
1,292,912,194.79x = 601,861,109,105,419,136 - Step 5: Solve for x
x = 601,861,109,105,419,136/1,292,912,194.79 - Step 6: Final answer
x = 465,508,107.61
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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.