Finding the Fourth Proportional to 1,278,135,032.40, 1,917,202,548.60 and 818,970,008.40
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Solution
The fourth proportional to 1,278,135,032.40, 1,917,202,548.60 and 818,970,008.40 is: 1,228,455,012.60
Step by Step Solution
- Step 1: Write the proportion equation
1,278,135,032.40 : 1,917,202,548.60 = 818,970,008.40 : x - Step 2: Convert to fraction form
1,278,135,032.40/1,917,202,548.60 = 818,970,008.40/x - Step 3: Cross multiply
1,278,135,032.40x = 1,917,202,548.60 × 818,970,008.40 - Step 4: Simplify right side
1,278,135,032.40x = 1,570,131,387,331,443,200 - Step 5: Solve for x
x = 1,570,131,387,331,443,200/1,278,135,032.40 - Step 6: Final answer
x = 1,228,455,012.60
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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.