Finding the Fourth Proportional to 1,207,612.13, 1,666,662.42 and 779,138.75
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Solution
The fourth proportional to 1,207,612.13, 1,666,662.42 and 779,138.75 is: 1,075,313.21
Step by Step Solution
- Step 1: Write the proportion equation
1,207,612.13 : 1,666,662.42 = 779,138.75 : x - Step 2: Convert to fraction form
1,207,612.13/1,666,662.42 = 779,138.75/x - Step 3: Cross multiply
1,207,612.13x = 1,666,662.42 × 779,138.75 - Step 4: Simplify right side
1,207,612.13x = 1,298,561,274,590.77 - Step 5: Solve for x
x = 1,298,561,274,590.77/1,207,612.13 - Step 6: Final answer
x = 1,075,313.21
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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.