Finding the Fourth Proportional to 770.30, 1,062.99 and 420.99
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Solution
The fourth proportional to 770.30, 1,062.99 and 420.99 is: 580.95
Step by Step Solution
- Step 1: Write the proportion equation
770.30 : 1,062.99 = 420.99 : x - Step 2: Convert to fraction form
770.30/1,062.99 = 420.99/x - Step 3: Cross multiply
770.30x = 1,062.99 × 420.99 - Step 4: Simplify right side
770.30x = 447,508.16 - Step 5: Solve for x
x = 447,508.16/770.30 - Step 6: Final answer
x = 580.95
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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.