Finding the Fourth Proportional to 1,938,846,256.21, 2,908,677,959.70 and 628,646,142.97
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Solution
The fourth proportional to 1,938,846,256.21, 2,908,677,959.70 and 628,646,142.97 is: 943,101,689.81
Step by Step Solution
- Step 1: Write the proportion equation
1,938,846,256.21 : 2,908,677,959.70 = 628,646,142.97 : x - Step 2: Convert to fraction form
1,938,846,256.21/2,908,677,959.70 = 628,646,142.97/x - Step 3: Cross multiply
1,938,846,256.21x = 2,908,677,959.70 × 628,646,142.97 - Step 4: Simplify right side
1,938,846,256.21x = 1,828,529,180,507,254,016 - Step 5: Solve for x
x = 1,828,529,180,507,254,016/1,938,846,256.21 - Step 6: Final answer
x = 943,101,689.81
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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.