Finding the Fourth Proportional to 1,292,912,147.36, 1,939,368,246.74 and 310,338,686.85
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Solution
The fourth proportional to 1,292,912,147.36, 1,939,368,246.74 and 310,338,686.85 is: 465,508,036.44
Step by Step Solution
- Step 1: Write the proportion equation
1,292,912,147.36 : 1,939,368,246.74 = 310,338,686.85 : x - Step 2: Convert to fraction form
1,292,912,147.36/1,939,368,246.74 = 310,338,686.85/x - Step 3: Cross multiply
1,292,912,147.36x = 1,939,368,246.74 × 310,338,686.85 - Step 4: Simplify right side
1,292,912,147.36x = 601,860,995,010,326,656 - Step 5: Solve for x
x = 601,860,995,010,326,656/1,292,912,147.36 - Step 6: Final answer
x = 465,508,036.44
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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.