Finding the Fourth Proportional to 1,238,478,199.41, 1,709,100,194.16 and 681,561,246.48
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Solution
The fourth proportional to 1,238,478,199.41, 1,709,100,194.16 and 681,561,246.48 is: 940,554,673.66
Step by Step Solution
- Step 1: Write the proportion equation
1,238,478,199.41 : 1,709,100,194.16 = 681,561,246.48 : x - Step 2: Convert to fraction form
1,238,478,199.41/1,709,100,194.16 = 681,561,246.48/x - Step 3: Cross multiply
1,238,478,199.41x = 1,709,100,194.16 × 681,561,246.48 - Step 4: Simplify right side
1,238,478,199.41x = 1,164,856,458,687,080,448 - Step 5: Solve for x
x = 1,164,856,458,687,080,448/1,238,478,199.41 - Step 6: Final answer
x = 940,554,673.66
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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.