Finding the Fourth Proportional to 1,086,400,430.80, 1,629,600,646.20 and 396,330,197.20
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Solution
The fourth proportional to 1,086,400,430.80, 1,629,600,646.20 and 396,330,197.20 is: 594,495,295.80
Step by Step Solution
- Step 1: Write the proportion equation
1,086,400,430.80 : 1,629,600,646.20 = 396,330,197.20 : x - Step 2: Convert to fraction form
1,086,400,430.80/1,629,600,646.20 = 396,330,197.20/x - Step 3: Cross multiply
1,086,400,430.80x = 1,629,600,646.20 × 396,330,197.20 - Step 4: Simplify right side
1,086,400,430.80x = 645,859,945,465,693,440 - Step 5: Solve for x
x = 645,859,945,465,693,440/1,086,400,430.80 - Step 6: Final answer
x = 594,495,295.80
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Double scale
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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.