Finding the Fourth Proportional to 521,640,683.80, 782,461,025.70 and 279,775,979.80
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Solution
The fourth proportional to 521,640,683.80, 782,461,025.70 and 279,775,979.80 is: 419,663,969.70
Step by Step Solution
- Step 1: Write the proportion equation
521,640,683.80 : 782,461,025.70 = 279,775,979.80 : x - Step 2: Convert to fraction form
521,640,683.80/782,461,025.70 = 279,775,979.80/x - Step 3: Cross multiply
521,640,683.80x = 782,461,025.70 × 279,775,979.80 - Step 4: Simplify right side
521,640,683.80x = 218,913,800,120,530,496 - Step 5: Solve for x
x = 218,913,800,120,530,496/521,640,683.80 - Step 6: Final answer
x = 419,663,969.70
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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.