Finding the Fourth Proportional to 813.95, 1,218.08 and 665.99
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Solution
The fourth proportional to 813.95, 1,218.08 and 665.99 is: 996.65
Step by Step Solution
- Step 1: Write the proportion equation
813.95 : 1,218.08 = 665.99 : x - Step 2: Convert to fraction form
813.95/1,218.08 = 665.99/x - Step 3: Cross multiply
813.95x = 1,218.08 × 665.99 - Step 4: Simplify right side
813.95x = 811,219.68 - Step 5: Solve for x
x = 811,219.68/813.95 - Step 6: Final answer
x = 996.65
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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.