Finding the Fourth Proportional to 1,278,794,220.80, 1,918,191,331.20 and 865,545,699.20
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Solution
The fourth proportional to 1,278,794,220.80, 1,918,191,331.20 and 865,545,699.20 is: 1,298,318,548.80
Step by Step Solution
- Step 1: Write the proportion equation
1,278,794,220.80 : 1,918,191,331.20 = 865,545,699.20 : x - Step 2: Convert to fraction form
1,278,794,220.80/1,918,191,331.20 = 865,545,699.20/x - Step 3: Cross multiply
1,278,794,220.80x = 1,918,191,331.20 × 865,545,699.20 - Step 4: Simplify right side
1,278,794,220.80x = 1,660,282,256,962,882,816 - Step 5: Solve for x
x = 1,660,282,256,962,882,816/1,278,794,220.80 - Step 6: Final answer
x = 1,298,318,548.80
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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.