Finding the Fourth Proportional to 780,276,019.20, 1,170,414,028.80 and 320,544,124.80
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Solution
The fourth proportional to 780,276,019.20, 1,170,414,028.80 and 320,544,124.80 is: 480,816,187.20
Step by Step Solution
- Step 1: Write the proportion equation
780,276,019.20 : 1,170,414,028.80 = 320,544,124.80 : x - Step 2: Convert to fraction form
780,276,019.20/1,170,414,028.80 = 320,544,124.80/x - Step 3: Cross multiply
780,276,019.20x = 1,170,414,028.80 × 320,544,124.80 - Step 4: Simplify right side
780,276,019.20x = 375,169,340,515,337,984 - Step 5: Solve for x
x = 375,169,340,515,337,984/780,276,019.20 - Step 6: Final answer
x = 480,816,187.20
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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.