Finding the Fourth Proportional to 781.38, 1,077.93 and 486.99
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Solution
The fourth proportional to 781.38, 1,077.93 and 486.99 is: 671.81
Step by Step Solution
- Step 1: Write the proportion equation
781.38 : 1,077.93 = 486.99 : x - Step 2: Convert to fraction form
781.38/1,077.93 = 486.99/x - Step 3: Cross multiply
781.38x = 1,077.93 × 486.99 - Step 4: Simplify right side
781.38x = 524,941.13 - Step 5: Solve for x
x = 524,941.13/781.38 - Step 6: Final answer
x = 671.81
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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.