Finding the Fourth Proportional to 863,135,999.80, 1,294,703,999.70 and 378,461,807.80
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Solution
The fourth proportional to 863,135,999.80, 1,294,703,999.70 and 378,461,807.80 is: 567,692,711.70
Step by Step Solution
- Step 1: Write the proportion equation
863,135,999.80 : 1,294,703,999.70 = 378,461,807.80 : x - Step 2: Convert to fraction form
863,135,999.80/1,294,703,999.70 = 378,461,807.80/x - Step 3: Cross multiply
863,135,999.80x = 1,294,703,999.70 × 378,461,807.80 - Step 4: Simplify right side
863,135,999.80x = 489,996,016,292,352,704 - Step 5: Solve for x
x = 489,996,016,292,352,704/863,135,999.80 - Step 6: Final answer
x = 567,692,711.70
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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.