Finding the Fourth Proportional to 1,278,165,740.80, 1,917,248,611.20 and 658,292,958.40
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Solution
The fourth proportional to 1,278,165,740.80, 1,917,248,611.20 and 658,292,958.40 is: 987,439,437.60
Step by Step Solution
- Step 1: Write the proportion equation
1,278,165,740.80 : 1,917,248,611.20 = 658,292,958.40 : x - Step 2: Convert to fraction form
1,278,165,740.80/1,917,248,611.20 = 658,292,958.40/x - Step 3: Cross multiply
1,278,165,740.80x = 1,917,248,611.20 × 658,292,958.40 - Step 4: Simplify right side
1,278,165,740.80x = 1,262,111,260,255,139,328 - Step 5: Solve for x
x = 1,262,111,260,255,139,328/1,278,165,740.80 - Step 6: Final answer
x = 987,439,437.60
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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.