Finding the Fourth Proportional to 1,188,348,926.40, 1,782,602,121.60 and 314,938,108.80
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Solution
The fourth proportional to 1,188,348,926.40, 1,782,602,121.60 and 314,938,108.80 is: 472,428,028.88
Step by Step Solution
- Step 1: Write the proportion equation
1,188,348,926.40 : 1,782,602,121.60 = 314,938,108.80 : x - Step 2: Convert to fraction form
1,188,348,926.40/1,782,602,121.60 = 314,938,108.80/x - Step 3: Cross multiply
1,188,348,926.40x = 1,782,602,121.60 × 314,938,108.80 - Step 4: Simplify right side
1,188,348,926.40x = 561,409,340,919,571,648 - Step 5: Solve for x
x = 561,409,340,919,571,648/1,188,348,926.40 - Step 6: Final answer
x = 472,428,028.88
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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.