Finding the Fourth Proportional to 213,048,019.80, 319,572,029.70 and 145,023,571.80
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Solution
The fourth proportional to 213,048,019.80, 319,572,029.70 and 145,023,571.80 is: 217,535,357.70
Step by Step Solution
- Step 1: Write the proportion equation
213,048,019.80 : 319,572,029.70 = 145,023,571.80 : x - Step 2: Convert to fraction form
213,048,019.80/319,572,029.70 = 145,023,571.80/x - Step 3: Cross multiply
213,048,019.80x = 319,572,029.70 × 145,023,571.80 - Step 4: Simplify right side
213,048,019.80x = 46,345,477,194,469,688 - Step 5: Solve for x
x = 46,345,477,194,469,688/213,048,019.80 - Step 6: Final answer
x = 217,535,357.70
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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.