Finding the Fourth Proportional to 728,083,612.80, 1,092,125,419.20 and 421,217,769.60
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Solution
The fourth proportional to 728,083,612.80, 1,092,125,419.20 and 421,217,769.60 is: 631,826,654.40
Step by Step Solution
- Step 1: Write the proportion equation
728,083,612.80 : 1,092,125,419.20 = 421,217,769.60 : x - Step 2: Convert to fraction form
728,083,612.80/1,092,125,419.20 = 421,217,769.60/x - Step 3: Cross multiply
728,083,612.80x = 1,092,125,419.20 × 421,217,769.60 - Step 4: Simplify right side
728,083,612.80x = 460,022,633,198,889,088 - Step 5: Solve for x
x = 460,022,633,198,889,088/728,083,612.80 - Step 6: Final answer
x = 631,826,654.40
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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.