Finding the Fourth Proportional to 778,400.79, 1,074,192.62 and 420,704.79
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Solution
The fourth proportional to 778,400.79, 1,074,192.62 and 420,704.79 is: 580,572.35
Step by Step Solution
- Step 1: Write the proportion equation
778,400.79 : 1,074,192.62 = 420,704.79 : x - Step 2: Convert to fraction form
778,400.79/1,074,192.62 = 420,704.79/x - Step 3: Cross multiply
778,400.79x = 1,074,192.62 × 420,704.79 - Step 4: Simplify right side
778,400.79x = 451,917,978,513.13 - Step 5: Solve for x
x = 451,917,978,513.13/778,400.79 - Step 6: Final answer
x = 580,572.35
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.