Finding the Fourth Proportional to 1,311,447.40, 1,966,004.70 and 778,402.60
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Solution
The fourth proportional to 1,311,447.40, 1,966,004.70 and 778,402.60 is: 1,166,911.59
Step by Step Solution
- Step 1: Write the proportion equation
1,311,447.40 : 1,966,004.70 = 778,402.60 : x - Step 2: Convert to fraction form
1,311,447.40/1,966,004.70 = 778,402.60/x - Step 3: Cross multiply
1,311,447.40x = 1,966,004.70 × 778,402.60 - Step 4: Simplify right side
1,311,447.40x = 1,530,343,170,092.22 - Step 5: Solve for x
x = 1,530,343,170,092.22/1,311,447.40 - Step 6: Final answer
x = 1,166,911.59
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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.