Finding the Fourth Proportional to 863,138,861.20, 1,294,708,291.80 and 857,092,243.60
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Solution
The fourth proportional to 863,138,861.20, 1,294,708,291.80 and 857,092,243.60 is: 1,285,638,365.40
Step by Step Solution
- Step 1: Write the proportion equation
863,138,861.20 : 1,294,708,291.80 = 857,092,243.60 : x - Step 2: Convert to fraction form
863,138,861.20/1,294,708,291.80 = 857,092,243.60/x - Step 3: Cross multiply
863,138,861.20x = 1,294,708,291.80 × 857,092,243.60 - Step 4: Simplify right side
863,138,861.20x = 1,109,684,434,626,385,536 - Step 5: Solve for x
x = 1,109,684,434,626,385,536/863,138,861.20 - Step 6: Final answer
x = 1,285,638,365.40
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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.