Finding the Fourth Proportional to 810.09, 1,118 and 478.62
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Solution
The fourth proportional to 810.09, 1,118 and 478.62 is: 660.54
Step by Step Solution
- Step 1: Write the proportion equation
810.09 : 1,118 = 478.62 : x - Step 2: Convert to fraction form
810.09/1,118 = 478.62/x - Step 3: Cross multiply
810.09x = 1,118 × 478.62 - Step 4: Simplify right side
810.09x = 535,097.16 - Step 5: Solve for x
x = 535,097.16/810.09 - Step 6: Final answer
x = 660.54
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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.